Here's a breakdown:
* Gravity is a force of attraction between any two objects with mass.
* The Earth has a large mass, so it exerts a strong gravitational pull on objects near its surface.
* This pull is what causes objects to fall towards the Earth when they are released.
It's important to note that gravity isn't limited to Earth. All objects in the universe exert a gravitational force on each other, but the effect is only noticeable when the masses involved are large.