Question

1. what are the 4 spheres of the earth? 2. what is the biosphere?

Explanation:

1. The four spheres of the Earth are the lithosphere (solid Earth), hydrosphere (water bodies), atmosphere (gaseous layer), and biosphere (life - containing layer).
2. The biosphere is the global sum of all ecosystems. It includes all living organisms (plants, animals, microorganisms) and their interactions with the lithosphere, hydrosphere, and atmosphere. It is the zone of life on Earth.

Answer:

1. Lithosphere, hydrosphere, atmosphere, biosphere.
2. The global sum of all ecosystems, including all living organisms and their interactions with other Earth spheres.