Please choose the correct answer to the question: In December, one side of Earth will receive less energy from the Sun than the other side. Which statement best explains this fact?

Answer1: Earth rotates on its axis. Answer2: Earth is tilted on its axis. Answer3: Sunlight traveling to Earth reflects off the Moon. Answer4: Sunlight traveling to Earth is blocked by Moon.

Answer format: answer1/answer2/answer3/answer4