Which of the following wave properties would be the best way to measure the height of a wave?
a) amplitude
b) frequency
c)equilibrium
d)trough

This one would be amplitude. The reason is because amplitude is the distance from the center of the wave to the farthest point on the wave. So, if the amplitude of a wave is, say, 5m, the distance between the center of the wave and the top (or bottom) would be 5 meters. And to find the total height, just double the amplitude.

Its 5 points nott 50 points