The diagram shows a person using a piece of gym equipment to lift weights.

A man sits on a chair with pulleys and a line attached to the side. His leg has the line attached to it and is shown in solid lines with his foot on the floor. His leg is also shown raised with a dotted extension of the line attached to it.

Which best describes the body in terms of simple machines?

The knees are inclined planes, and the lower legs hold the loads. The ankles are the fulcrums.
The lower legs are inclined planes, and the knees hold the loads. The ankles are the fulcrums.
The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.
The knees are levers, and the lower legs are fulcrums. The ankles hold the loads.