Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The question asks for the verb form of "necessity," which refers to the essential requirement or condition of something. To understand why the correct answer is "D) Necessitate," we must examine the root of the word. The noun "necessity" originates from the Latin word "necessitas," which denotes something that is indispensable or unavoidable.

The term "necessitate" is derived from the same Latin root, and it functions as a verb meaning "to make necessary" or "to impose a necessity." This aligns with the definition of "necessity," as it expresses the action of requiring something to occur. For example, one might say, "The situation necessitates urgent action," highlighting that the circumstances demand a response.

In contrast, the other options—A) Necessity (noun), B) Necessiate (less commonly used but can be considered a verb), and C) Necessitise (a less standard variant)—do not effectively convey the action associated with "necessity." Therefore, "D) Necessitate" is the most accurate verb form related to the noun "necessity," making it the correct choice in this context.