The change of position (in meters) per unit time is:

The correct answer is velocity because it is defined as the rate of change of an object's position with respect to time. In simpler terms, velocity tells us how fast an object is moving and in what direction. It is measured in units such as meters per second (m/s), which directly correlate to the physical movement of an object through space over a specified duration.

Acceleration, on the other hand, refers to the rate of change of velocity per unit of time, indicating how quickly an object is speeding up or slowing down. Displacement represents the shortest distance from the initial position to the final position of an object, encompassing both distance and direction but does not account for how quickly that movement occurs. Force relates to the push or pull acting on an object, measured in newtons (N), but does not include any direct reference to a change in position over time. Therefore, velocity most accurately corresponds to the change of position per unit time.