Which of the Earth's spheres is made up of all living things?

a. the atmosphere

b. the biosphere

c. the lithosphere

d. the hydrosphere

The biosphere is made up of all living things (organisms).

The biosphere includes animals, biomes, population, communities, and ecosystems. The biomes are climate regions which can contain certain types of animals and plants. An ecosystem is all living things in one specific area, also such as plants, animals, and organisms.

Answer=B

The biosphere is made up of all living things