Context: Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Earth is pulling on the Moon.
According to Newton's third law, what other force must be happening?
A. The Moon is pushing on Earth.
B. The Moon is pulling on Earth.
Choose the right answer from the options and respond with its letter.

B