Which of the following identifies that a witness didn't directly answer a question?

The choice that indicates a witness didn't directly answer a question is represented by an answer made by gesture only. This option highlights a lack of verbal communication in the response, suggesting that the witness chose to communicate non-verbally instead of providing a direct answer to the inquiry. In the context of transcription, such a response would be important to note, as it reflects on the witness's engagement and intention, as well as potential implications for the communication process in legal settings.

In contrast, the other choices do not clearly denote that a witness has avoided answering directly. Indiscernible responses imply that the response could not be understood, but they do not explicitly indicate a decision to avoid responding. A notation of "no audible response" indicates silence, which again does not confirm avoidance but rather a lack of any response whatsoever. Saying that the witness declined to answer would imply a direct refusal to respond, which is distinct from communicating via gesture. Hence, the notion of using gestures to respond encapsulates the concept of not answering directly while still providing some form of reaction.