What of a wave is a measure of the energy it carries

The amplitude of a wave is a measure of the energy it carries. The amplitude of a wave is the distance between the midline of a wave and its crest or trough.

Amplitude measures the amount of energy  being transported by a wave. The larger the amplitude, the more the energy that a wave has.

Wave such as water waves have energy. Smaller waves have less energy because they have a smaller amplitude. Tsunamis have very high amplitudes and thus have a huge amount of energy

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

option number c is the right answer.