Which best describes vibration?
the distance traveled per unit in time
the action of moving back and forth quickly and steadily
the distance between one compression and the compression next to it
the action of moving through a material or substance

The answer would be the action of moving back and forth quickly and steadily.

The vibration is simply described as the shaking and oscillations occur.  The oscillation may sometimes be periodic like the action or the motion of a pendulum, or the motion of a tire.

Option (b) is the correct answer.

Explanation:

Vibration is the rapid or quick periodic motion of a particle or substance in the forward and backward direction from its equilibrium position.

Out of the given options, the statement action of moving back and forth quickly and steadily best describes vibration.

Vibration can also be regarded as trembling motion of a substance.

that's what i got you can count the number of atoms