Question

1. a pulley helps by:

○ storing energy
○ changing the direction of a force
○ adding weight
○ increasing friction

Explanation:

A pulley is a simple machine. Its main function is to change the direction of a force (e.g., lifting a weight by pulling down with a pulley system). Storing energy is not a pulley's role, adding weight is not what it does, and increasing friction is not its purpose. So the correct option is the one about changing the force's direction.

Answer:

Changing the direction of a force (the option with "Changing the direction of a force" text)