When the Earth is moving away from the sun it begins to slow down, why is that?

Question

1.The pull of the sun relative to the motion of Earth changes.
2. Earth's inertia is pointing backwards on the orbit. 3.The gravitational pull of the Earth on the sun changes.
4.Earth's inertia begins pointing toward the sun.

Answer 1

The correct answer is: 1. The pull of the sun relative to the motion of Earth changes.