Congestion is the state of being blocked. The word is often used to describe traffic that has slowed because of the number of cars in a given area. It is likewise used to describe when one’s nose / air passages are filled with fluid or mucus. To be “obstructed” means “to be blocked.” Thus, we could say, “As congestion is by its nature obstructed, so is a cascade X.” A cascade is either a small type of waterfall or any type of continuous passing on of material or information. Thus, a cascade by its nature is something flowing.

A desperado is a person who is completely desperate—hence the name—an therefore likely criminal and reckless in action. Having no hope, such a person will do anything to further his station. The option “reckless” describes a character trait of a desperado, so the analogy requires that you select a character trait for a puritan. Since the term is not being used with a capital “P,” it here means merely someone who is very strict and rigid in morality. This may often have been the case with the Puritans in early America, but they are no longer among us. Still, the term lives on. Such “puritanical” people are “abstemious,” that is, they abstain or do not indulge in many pleasures.

When someone “intuits” something, he or she understands or sees it instinctively; however, such a person cannot often provide a complete defense for what has been intuited. It is like a type of “hunch” that instinctually sees a truth or answer. Thus, the analogy could be expressed, “As an intuition is instinctive in character, so is something procedural X.” Something procedural is quite unlike something intuitive.  While something intuitive “cuts through” to the heart of some matter, something procedural follows step by step to the goal—like a careful procedure. This could be called plodding—at least that is the best option for this analogy.

When someone libels another person, he or she tells an untruth regarding that person (generally intending to ruin that other person’s reputation). The analogy could be written, “As a libel expresses an untruth, so a report expresses X.” The only answer that makes sense for “report” in this case is “data,” for this would be an object like “untruth” is with regard to libel.

A lunatic is someone crazy, and such a person’s actions could be called “lunacy.” The word means “the state of being crazy.” Surprisingly, perhaps, the word comes from the same base as does the word “lunar,” namely from the Latin for “moon.” It was believed that the personalities / attitudes of lunatics varied with the moon. Hence, they were given this name. The analogy could be rewritten, “As lunacy is generally insane behavior, so is maturity a state of X behavior.”  Someone who is mature sees the world in a level-headed and generally wise manner. Such a person could be called “sensible,” that is “wise or prudent.”

"Stubborn" and "obstinate" are strong synonyms; therefore a synonym for "callous" is "uncaring."

A “segue” is an immediate transition from one scene or song in a movie, musical, play, symphony, etc. It ultimately comes from the Latin for “to follow,” which we use in the phrase “non sequitur,” which means, “That does not follow from what went before it.” The analogy could be written, “As a segue is characterized by being immediate, so is eloquence characterized by X.” Eloquence is a persuasive form of speaking or writing. Often, the word is also used to describe a beautiful use of language. For our analogy, “convincing” best describes a characteristic of eloquence.

The word “subsidiary” is literally derived from the prefix “sub-” meaning “below” and the base meaning “to sit.” The base is related to words like “sedentary” and “sediment.” A subsidiary company is one that is run by an over-arching parent company. More generally, the term can be used to describe something that is of lesser importance in comparison with something that is overarching and more important. This subsidiary thing generally supplements the larger enterprise, offering aid. Thus, the analogy could be written, “As something subsidiary offers aid, so does something hindering offer (etc) X.” Note that we need to have some flexibility regarding the verb in the second half of the analogy. The best verb will be “create” or “make,” but that cannot be known until you start attempting to provide answers. Among the options, only “obstacle” describes that which something hindering creates. To “hinder” is to make something difficult for someone else.

A quagmire is literally a type of swampy area, though the term is often used metaphorically. In the latter usage, the term means “a complex and awkward situation.” (This would be like getting stuck in a bog, which would be a muck-covered, messy affair.) Something that is a quagmire could fairly be described as being confusing. We could potentially rewrite the analogy as stating, “As a quagmire can be characterized as being confusing, so can geniality be characterized as being X.” Something genial is friendly or cheerful. Such a thing would characteristically be enjoyable as well. This is the best option among those provided, since we are not looking for a direct synonym but an acceptable secondary characteristic.

A heap is merely a jumbled and disorganized pile of items. It has no unity or order. Thus, our analogy could be written, “As a heap is characterized by being jumbled, so is a system characterized by being X.” Generally speaking, a system is an interconnected whole, organized and ordered in a careful manner according to rules or laws. Such a thing is fairly characterized as being organized, which is the best answer among those provided.