Earth rotates on its axis. Earth is tilted on its axis. Sunlight traveling to Earth reflects off the Moon. Sunlight traveling to Earth is blocked by Moon.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In December, one side of Earth will receive less energy from the Sun than the other side. Which statement best explains this fact?
Possibilities:
- Earth rotates on its axis.
- Earth is tilted on its axis.
- Sunlight traveling to Earth reflects off the Moon.
- Sunlight traveling to Earth is blocked by Moon.

Earth is tilted on its axis.