What are the origin of gravity forces on our earth?

Question

What are the origin of gravity forces on our earth?

Answer 1

the mass of the earth.

Answer 2

Gravity is due to a curvature of space-time. Every object curves space-time to a certain degree, so we all have our own gravity. However, because the Earth is so massive, the curvature is so great that it keeps us in place, rather than floating off. It tries to pull us into the centre of the curve, but the physical presence of the ground keeps us there.

Answer 3

The prime source of gravity on Earth is the mass of the Earth itself, we are also influnenced by the sun's gravity which keeps us in orbit around that star, The surface of the Earth is distorted, to a minor degee, by the pull of the gravity of our satellite, the moon.