As the question compares two people, a comparative form of the adjective in question must be used, meaning that "few," the regular form of the adjective, and "least" and "fewest," which are each superlative forms, are incorrect. While "fewer" and "less" might each look like a potentially correct answer, "fewer" is used to distinguish between countable nouns, while "less" is used to distinguish between uncountable nouns, like "water." (You can tell if a noun is countable or not if you could precede it with a number, and "seven water" doesn't make sense, given how "water" is used here.) So, "less" is the correct answer.

"Intelligently" is an adverb and adverbs are not used comparatively, so we need to change "intelligently" to "intelligent," an adjective. Also, "lesser," an adjective, needs to be changed to a determiner, "less." So, "less intelligent" is the correct answer.

If only two things are being compared, the comparative form ("better," "bigger," "smarter," etc.) is correct. If three or more things are being compared, the superlative form ("best," "biggest," "smartest," etc.) is correct. Because there are only the two brothers here, we use the comparative form: “worse” and not “worst.” In addition, because “worse musician” is more concise than “worse of the two musicians,” it is the better answer.

If only two things are being compared, the comparative form ("better," "bigger," "smarter," etc.) is correct. If three or more things are being compared, the superlative form ("best," "biggest," "smartest," etc.) is correct. Because there are three gardens here, we use the concise superlative form: “prettiest” and not “prettier,” “most pretty,” or “most prettiest.”

When comparing more than two items, you should use superlative adjectives. So, in this case, you should use the word "best."

Here, because you are making a direct comparison between two things, and the adjective in question is "fun," "more fun" is the correct construction. Additionally, you want to use "than," which indicates comparison, rather than "then," which indicates time or causation. 

Here, you have a comparison between an individual and a group of people the size of which is unknown. Because you are not comparing two things directly, this is a superlative comparison. As such, the correct construction is "most avaricious."

In this sentence, one team's ideas are being compared to the ideas of many teams; therefore, it is correct to use the superlative form of "simple" ("simplest") rather than the comparative form ("simpler"), which is used when comparing two people or things. This means that the correct answer is "this team's proposal was the simplest." "Many" is an excellent warning sign of a superlative to come!

When two things are being compared, it is necessary to use the comparative form of the adjective or adverb in question. In the case of "strong" the comparative construction is "stronger," and it is correct in the sentence. When more than two things ("a few things," for instance) are being compared the superlative is required: "Of all the boys, Tom is the strongest." A superlative is used to distinguish one person or thing from a group, a comparative is used to compare one thing or person to another.

When two things are being compared, it is best to use the comparative form of the adjective or adverb in question. In the case of "quickly" the comparative construction is "more quickly," and it is correct in the sentence. "As quickly as" would also be acceptable in this situation.