The force from the sun that pulls on Earth and keeps it in orbit is gravity.

Here's a breakdown:

* Gravity: Every object with mass exerts a gravitational pull on every other object with mass. The more massive an object, the stronger its gravitational pull.

* The Sun's Gravity: The sun is incredibly massive, so its gravitational pull is strong enough to hold all the planets in our solar system in orbit around it.

* Orbital Motion: Earth's forward motion, combined with the Sun's gravitational pull, creates a balance. The Earth wants to travel in a straight line due to its inertia, but the Sun's gravity pulls it inward, causing the Earth to follow a curved path – its orbit.