Why does the Earth have 1 moon?

Answer 1

the Earth has a moon because while the earth was just a new planet, still forming, a big meteor hit earth and made a big dent somewhere... debris dust, and big chunks of earth flew into space. the pieces wandered around earth, the gravitational pull of earth kept it in an orbit. as the chunks and pieces flew around, they clumped together getting bigger and bigger. within weeks, our moon was formed. that's why the moon changes the tide level

Answer 2

The most widely accepted theory is that the Moon was formed when a Mars-sized proto-planet collided with Earth early in its history, resulting in debris that eventually coalesced to form the Moon. This collision disrupted the Earth's rotation and led to the creation of the Moon in its current orbit around our planet.