Answer:
Then the correct answer is the a=atmosphere
Explanation:
Hello ! Let's solve this!
The biosphere is the part of the Earth composed of water, earth and air.
The hydrosphere is the part that is formed by water.
The geosphere is the part of land that is solid.
The atmosphere is the layer of air that surrounds the Earth. This layer is composed of sub-layers.
Then the correct answer is the a=atmosphere
