why does an astronaut weigh less on the moon than on Earth?

Question

is it because the gravitational field strength is less on the moon's surface than on Earth's surface

Answer 1

or is it because he/she has less mass on the moon..?

Answer 2

Your first answer is the correct one.

Answer 3

Because the gravity on earth is 6x times more then the gravity on the moon so like if i weighed 53 pounds on earth then i would weight 8.79 on the moon.