Topic: Adjective (বিশেষণ),

Best Answer Explained in Below-:

The phrase "Sweet are the uses of adversity" originates from Shakespeare's *As You Like It*, and the word "sweet" functions as an adjective within this context. To understand why "sweet" is classified as an adjective, it's important to examine its role in the sentence.

In English grammar, adjectives are words that describe or modify nouns. They provide additional information about a noun's qualities or characteristics. Here, "sweet" describes the noun "uses," indicating a positive quality or a pleasant aspect of how adversity can be utilized or perceived. The word "sweet" evokes feelings of pleasure or delight, contrasting with the typically negative connotation of "adversity."

By asserting that the "uses of adversity" are "sweet," the statement highlights the beneficial outcomes that can arise from challenging experiences. Thus, by clarifying the nature of "uses" (what kind of uses they are), "sweet" fulfills the function of an adjective, making option B the correct answer. In contrast, the other options—verb, adverb, and noun—do not accurately represent the grammatical role of "sweet" in this context.