Question

1. which simple machines are closely related? inclined planes and screws pulleys and screws inclined planes and pulleys wheel and axles and screws

Explanation:

A screw is essentially an inclined - plane wrapped around a cylinder. The threads of a screw form an inclined - plane that allows it to be turned and inserted into materials more easily. Pulleys, wheel and axles have different mechanical principles and are not as closely related to inclined planes as screws are.

Answer:

inclined planes and screws