Question

1. what part of he wave is labeled with an a. amplitude wavelength trough crest

Explanation:

Amplitude is the maximum displacement from the rest position (the dashed line in the wave diagram). Wavelength is the distance between two consecutive crests or troughs. Trough is the lowest point of the wave. Crest is the highest point. The label A in the wave diagram represents the maximum displacement from the rest position, which is the definition of amplitude.

Answer:

Amplitude