Giving an appropriate answer to a listener's question is part of what?

Correct answer: Effective verbal communication

The governing concept is responsive verbal communication. When a speaker gives an appropriate answer, the response is relevant to the listener’s question, demonstrates understanding, and keeps the exchange meaningful. Option C is correct because responding suitably is an important part of effective verbal communication. Drawing, remaining silent, or improving handwriting may be useful in other situations, but none of them describes answering a spoken question clearly and appropriately.