Which sphere of earth do humans exist in?

BIOSPHERE

Explanation:

Human beings like animals or plants are part of the biosphere, one of the spheres in the earth.

I hope this helps

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.