The coefficient of friction is best described as a value that compares:
a. the force of friction and the force that's pushing two surfaces
together.
o
b. the fluid friction in water versus the fluid friction in another liquid.
o
c. the force of static friction and the force needed to pick the object
up.
o
d. the amount of friction and the force of laying two surfaces on top
of each other.

The coefficient of friction is best described as a value that compares the force of friction and the force that's pushing two surfaces  together.

Option A

Explanation:

The coefficient of friction stands as the reason why some surfaces easily slip on each other while others don't. Basically, when two bodies get in contact with one another, a force called friction to come into the picture that exerts a force in between the contact surface of both the bodies.

At the same time, there is another force acting upon the bodies perpendicularly. This is known as the Normal force and the ratio between the frictional force and the normal force decides the smoothness of motion between the two contact surfaces of the bodies. Coefficient of friction varies for various objects and is more in value for the static objects as compared to the moving ones.