Answer: 3) Providing feedback
Explanation: Feedback is the response that is gained after the any particular activity, communication, service,task etc for knowing about the performance quality and improvement required in the task.
As per the question, Mike is providing feedback on the performance review given by Selina. He is asking for more descriptive details on some topics so that his confusion can be cleared. Thus, improvement in the describing performance review is encouraged in the situation.
Other options are not correct because channel opting, noise shift , decoding or encoding is not being done through the communication taking place between Mike and Selina.
Thus, the correct option is option(3).