Question

there are many rocks in space. they come in different shapes and sizes. asteroids are rocks that orbit the sun. they are smaller than planets. the largest asteroids are called planetoids. in our solar system, most asteroids are in a place called the asteroid belt. this is an area in space between the planets mars and jupiter. the largest asteroid is named ceres. ceres is 600 miles wide. thats the size of texas! asteroids have landed on earth before. when they hit the ground, they leave holes called craters. there are craters in the ground from asteroids that hit earth 30,000 to 50,000 years ago! scientists arent sure when the next asteroid will reach earth. asteroids usually hit earth once or twice every million years. craters can be created when a asteroids hit the earth. b ceres travels close to other asteroids. c earth rocks are launched into space. d asteroids hit each other and break into tiny pieces.

Explanation:

The text states that "When asteroids hit the ground, they leave holes called craters". So craters are created when asteroids hit the Earth.

Answer:

A. asteroids hit the Earth.