What is the surface of the earth made up of?​

Underneath the water that fills the oceans, and the dirt and plants that cover the continents, the Earth's surface layer is made of rock.

Explanation:

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.