Question

(12) How many spheres are there on the earth?
A. One B. Two
c. Three D. Four​

Answer 1

Answer:

four

Explanation:

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).

Answer 2

Answer:

three

Explanation:

as the earth is divided into three consentric layers- crust,mantle,core