A monkey climbs a rope, pulling down on it to hoist himself up.

What is the equal and opposite force for the force of the monkey pulling on the rope as described by

Newton's third law?

the rope pulls the monkey upward with the same force

Explanation:

When the monkey pulls the rope exerts a force on it, in response the rope pulls the monkey upward with the same force, these two forces are action and reaction forces.

The characteristics of these forces are of the same magnitude. They are applied from the bodies involved and have opposite directions.

Therefore with the force of the rope the monkey climbs on it