Based on the given answers, we can determine the correct response by matching the answers with the corresponding options provided for each question. However, since you have only provided the answers and not the actual questions, I cannot accurately determine which response refers to using sunscreen for protection against harmful UV rays. To provide the correct response, I would need the questions associated with the answers provided.
The correct response when referring to using sunscreen for protection against harmful UV rays is to apply a sunscreen with a high SPF, preferably SPF 30 or higher, and to reapply it every two hours or more frequently if sweating or swimming.
