A push or a pull on an object is known as a force.
Option D.
Step-by-step explanation:
For example, if we kick a ball the ball moves in the direction of the kick. Here on kicking the ball we apply a force on the ball that made the ball move. So, the motion (push/pull) of an object is due to the force applied on it.
Force is a vector quantity defined by the product mass and acceleration. That is, F=ma. The SI unit is Newton (N).
Velocity is the rate of change of speed of an object.
Acceleration of an object is the rate of change of velocity.