Answer:
D) Centripetal force.
Step-by-step explanation:
A centripetal force is the force which is made up of two Latin words centrum which means center and the petere which means to seek.
It is defined a force which make a body to follow a curved path.
The direction of this force is always orthogonal to the body's motion and it is always towards the fixed point which is instantaneous center of the path's curvature.