Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The question asks for the noun form of the adjective "coward." While many might instinctively choose "cowardice," the term "cowardness" can be misleading due to established norms and preferences in English usage.

Let's break it down:

- "Cowardice" (option A) is indeed the most commonly accepted noun form that describes the quality or state of being a coward. It has a rich history in the English language and is used widely in literature and everyday speech. Thus, it is often the correct answer in standard grammatical terms.

- "Cowardness" (option B), although not standard, could be misconstrued as a potential alternative. However, it is not a recognized term in most dictionaries and rarely used in modern English, which makes it less valid.

- "Cowardly" (option C) is an adjective that describes someone as behaving like a coward.

- "Cowardy" (option D) is not a standard English word at all.

Given this clarification, the correct answer should actually be "A) cowardice" rather than "B) cowardness." It's crucial to rely on standard definitions and usage when determining the correct form of a word.