Question

the material through which a wave travels
amplitude wave
speed medium

Explanation:

To determine the correct term for "the material through which a wave travels", we analyze each option:

• "amplitude" refers to the maximum displacement of a wave from its rest position, not the material.
• "wave" is the disturbance itself, not the material it travels through.
• "speed" is the rate at which the wave travels, not the material.
• "medium" is defined as the material (solid, liquid, gas, or vacuum in some cases) through which a wave propagates.

Answer:

D. medium (assuming the options are labeled A: amplitude, B: wave, C: speed, D: medium; if the blue box with "medium" is the fourth option, the correct one is the blue box labeled "medium" or the option with "medium" text)