Answer the following question given this paragraph: 

The landscape of the Moon - its surface features - is very different from Earth. The lunar landscape is covered by craters caused by asteroid impacts ( Figure below ). The craters are bowl-shaped basins on the Moon’s surface. Because the Moon has no water, wind, or weather, the craters remain unchanged.


Q: The lunar landscape is covered by craters caused by what?

 Choices:

- earth impacts

- volcanoes

- water

- asteroid impacts

A:
asteroid impacts
