Concept:Reflection in the x-axis keeps the x-coordinate the same and changes the sign of the y-coordinate.Explanation:For any point (x,y), its image after reflection in the x-axis is (x,−y).Here, the point is P(−3,7).Applying the rule, the x-coordinate −3 remains unchanged, and the y-coordinate 7 becomes −7.So, the image is (−3,−7).Answer:(−3,−7), i.e., option A.