Final answer:
An inclined plane helps move a large load by reducing friction between the load and the surface. (option a)
Step-by-step explanation:
An inclined plane helps move a large load by reducing friction between the load and the surface. It reduces the force required to move the load compared to lifting it straight up vertically. When a load is placed on an inclined plane, the force required to move the load is reduced compared to lifting it straight up vertically. The inclined plane allows the load to be moved over a longer distance with less force.
The force required to move an object on an inclined plane is divided into two components: one parallel to the plane (the effective force contributing to movement) and the other perpendicular to the plane (the force opposing movement, including gravitational force). By increasing the length of the ramp (the inclined plane), the effective force required to move the load is reduced, as it's spread over a longer distance. This makes it easier to overcome the resistance, including friction, and move the load.