When water waves form in the ocean, water is the
the waves travel through.
A. vacuum
B. amplitude
C. magnetic material
D. medium

Amplitude

Explanation:

The amplitude of a periodic variable is a measure of its change over a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts the phase is sometimes called the amplitude.

because if the tool that you are using is not balanced it there would be false mass.