stress due to the movement of Earth's crustal plates gravitational variation due to the Moon's orbit around Earth temperature variation due to Earth's orbit around the Sun rotational imbalance due to changes in the location of Earth's poles
I gave my students this multiple choice question: An earthquake occurs in western Nevada. What most likely causes the earthquake?

Only one answer is correct among these 4 choices:
- stress due to the movement of Earth's crustal plates
- gravitational variation due to the Moon's orbit around Earth
- temperature variation due to Earth's orbit around the Sun
- rotational imbalance due to changes in the location of Earth's poles

Could you tell me which one is correct?

stress due to the movement of Earth's crustal plates