The Earth is a planet that (a) around the Sun. This movement is called (b) . The Earth takes about 365 days to complete one (c) around the Sun.
The main reason why the Earth (d) around the Sun is because of the force of gravity. Gravity is a force that pulls objects towards each other. The Sun is much larger and has more mass than the Earth, so the Earth is pulled towards the Sun. This gravitational force keeps the Earth (e) around the Sun.