Question

he is pulling on the earth with a force that is...
a smaller force than the one pulling on him (just in an opposite direction).
a larger force than the one pulling on him (just in an opposite direction).
the same as the force pulling on him (just in an opposite direction).

Explanation:

According to Newton's third - law of motion, for every action, there is an equal and opposite reaction. The force exerted by a person on the earth is equal in magnitude and opposite in direction to the force the earth exerts on the person.

Answer:

The same as the force pulling on him (just in an opposite direction).