Here's the breakdown:
* Gravity: Every object in the universe with mass exerts a gravitational pull on every other object. The more massive an object, the stronger its gravitational pull.
* The Sun's Mass: The Sun is significantly more massive than Earth. This means it has a much stronger gravitational pull.
* Orbital Motion: This strong gravitational pull from the Sun keeps Earth in orbit around it. Imagine a ball tied to a string being swung in a circle. The string represents the Sun's gravity, and the ball represents Earth. The string keeps the ball moving in a circle, just as gravity keeps Earth in orbit.
It's not about "strength" but about relative mass. The Sun's enormous mass dictates the gravitational relationship, causing Earth to revolve around it rather than the other way around.
Think of it this way: Earth and the Sun are dancing together, but the Sun leads the dance because it has much more mass and gravitational influence.