Question

consider the free - body diagram. if you want the box to move, the force applied while dragging must be greater than the a normal force b friction force c inertia force d force of gravity

Explanation:

In order to move the box horizontally, the applied horizontal - dragging force must overcome the force that resists the motion. The normal force acts perpendicular to the surface and balances the gravitational force in the vertical direction. The force of gravity acts vertically downwards. The frictional force acts horizontally and opposes the motion of the box. To move the box, the applied force must be greater than the frictional force.

Answer:

B. frictional force