The correct answer is A. Gravitational force.
Gravitational force is a force of attraction between any two objects with mass. The more mass an object has, the stronger its gravitational pull. The Earth has a very strong gravitational pull, which is why objects on Earth fall down when they are dropped.
Satellites are objects that are put into orbit around the Earth. They are held in orbit by the Earth’s gravitational pull. The Earth’s gravity pulls on the satellite, but the satellite is moving so fast that it keeps falling
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