Question

acceleration is defined as the rate of change for which characteristic?
time
displacement
position
velocity

Explanation:

Acceleration is defined as the rate of change of velocity. Velocity is a vector quantity that includes both speed and direction. When an object's velocity changes (either in magnitude, direction, or both), it is said to be accelerating. Time is the independent variable in the calculation of acceleration ($a=\frac{\Delta v}{\Delta t}$). Displacement is the change in position of an object. Position is a specific point in space. But acceleration directly relates to the change in velocity over time.

Answer:

velocity