Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The word "ability" refers to the capacity or skill to do something. When analyzing the options provided, we seek to identify a word that functions as a verb related to "ability."

Option A, "ableness," is a noun that denotes the quality of being able, but it does not serve as a verb. Option C, "able," is an adjective describing someone possessing the skill or capability but, like "ableness," does not function as a verb. Option D, "ably," is an adverb that describes the manner of action, typically indicating the performance of a task, but it is not a verb either.

The correct choice, B) "enable," is derived from the verb "enable," which means to make someone or something able to do something. In this context, “enable” directly relates to the concept of ability, as it denotes the act of providing someone with the means or opportunity to acquire or use their abilities. Thus, among the options, "enable" is the only term that serves as a verb, making it the correct answer.