Which of the following best describes a mathematical wave A: A transfer of energy
B: A movement of matter
C: When energy is converted from one form to another
D: A periodic disturbance of a medium

D:

A periodic disturbance of a medium

Explanation:

A wave can be Mathematically defined by periodic disturbance of a medium. That is, oscillations of the waves about a fixed position or change in position from the resting equilibrium position. The wave oscillate from equilibrium position with amplitude periodically.

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