A "manual" is a handbook or a written guide on how to do something or directions included with a product that explain how to use it. So, "handbook" is the correct answer. None of the other answer choices are close in meaning to "manual": a "telescope" is a device you use to look at things in outer space; and "binoculars" are a device that you use to look at something far away.

“Endeavor” means seriously and continually try to do something, and an “endeavor” is an activity directed toward a goal. Likewise, an “undertaking” is an activity directed towards a goal, so "undertaking" is the correct answer. You can say a long “journey” is a great endeavor or a big undertaking, for instance, but “journey” is not synonymous with "endeavor" or "undertaking." “Search” means look for, and “explore” means adventure or look around an area with which you are not familiar. 

When used as a verb, "buff" means "polish" or burnish, so "polish" is the correct answer.

BEAR may refer to several things, but the only option that has one of its meanings is withstand.

To MARKET something means to promote it.

When used as a noun, "conduct" means behavior or deportment, so "behavior" is the correct answer. (Perhaps your school has a "code of conduct" that explains rules about behavior.) None of the other answer choices are close in meaning to "conduct": a “legend” is a myth; a "citadel" is a fortress; "comprehension" is understanding; and a "stitch" is a unit in knitting or in a seam in sewing.

"Soil" can mean dirt when used as a noun, but because none of the answer choices can be used as nouns, this isn't the meaning that you should consider. When used as a verb, "soil" means cause to become dirty; "soiled clothing" is dirty clothing. Given this, the correct answer is "stain," as when something is "stained," it is made dirty through unwanted markings, or "soiled." As for the other answer choices, "wash," when used as a verb, is an antonym, or opposite, of "soil," because while "soil" means cause to become dirty, "wash" means cause to become clean through the use of soap and water. "Insist," "dangle," and "whisk" are not related in meaning to "soil": "insist" means demand to have one's way; "dangle" means suspend in midair; and "stir" means mix something to blend its parts together.

"Sovereign" is defined as possessing supreme or ultimate power, so "supreme" is the best answer choice. The word "sovereign" is often used when referring to government officials who wield a great deal of power and influence over the masses.

"Document," when used as a verb, means record something in written form, photographic form, or another form. As a noun, "document" means recorded information in the form of a paper with text on it. Seeing as "record" is mentioned in document's definition, record is clearly our best answer!

To “brawl” means to fight, usually in a wild manner or, when used as a noun, just such a wild fight. To provide further help, “inspect” means to look at, and “goad” means to say things in order to try and get someone to do something stupid. It means something similar to “provoke” or “encourage.”