When drawn on a coordinate plane with the x-axis as the baseline, a wave with a crest that is closer to the baseline has a smaller amplitude.
The correct answer is "amplitude". When a wave is drawn on a coordinate plane with the x-axis as the baseline, the amplitude is the distance between the baseline and the crest (or trough) of the wave. A larger amplitude means that the wave extends further from the baseline, while a smaller amplitude means that the wave is closer to the baseline. In this case, since the question states that the crest is closer to the baseline, it implies that the amplitude is smaller.
