Which is an example of the affective domain?

The correct answer, which highlights an example of the affective domain, emphasizes the aspect of emotional responses and feelings in learning. The affective domain is concerned with how individuals feel about what they are learning and how those feelings influence their attitudes, values, and behaviors.

Reacting to an instructor's question involves not just cognitive processing but also emotional involvement. This can include expressing enthusiasm, surprise, confusion, or agreement, reflecting personal engagement and emotional reactions shaped by the learning experience. It encapsulates an interactive response that highlights an emotional dimension of learning.

Other options primarily focus on cognitive skills or psychomotor tasks. For instance, answering an instructor's question refers more to the intellectual process of recalling or understanding information, while demonstrating a skill pertains to the psychomotor domain, which involves motor skill performance or physical demonstration. Writing a reflection on the lesson can touch on feelings but is more about articulating thoughts and conclusions rather than immediate emotional responses. Hence, all those choices, though valid in their own domains, do not encapsulate the essence of the affective domain as effectively as the first choice does.