Topic: Pair of Word,

Best Answer Explained in Below-:

The question involves the phrase "He is a man __ of morals," where we need to choose the correct form of a word to complete the sentence. The correct answer is **A) loose**.

In this context, "loose" functions as an adjective meaning "not firmly fixed; free." When describing a man as "loose of morals," it implies that his ethical principles are not firmly established or are flexible. This conveys a sense of irresponsibility or lack of commitment to moral standards.

Let’s consider the other options:

- **B) lose** is a verb meaning "to not have something anymore," which does not fit the sentence structure or context.
- **C) loss** is a noun indicating the state of losing something, which again does not suitably complete the phrase related to moral character.
- **D) less** is an adverb, often used for comparison, but it does not grammatically or contextually fit in the phrase about a person's morals.

Thus, "loose" is the only option that correctly conveys the intended meaning, as it characterizes a person's moral orientation effectively in the given context.