Question

The hydrosphere, lithosphere, biosphere, and atmosphere are all examples of __________.

A)
open systems
B)
closed systems
C)
biological systems
D)
ecosystems

Answer 1

A

Step-by-step explanation:

Just took the test

Answer 2

The answer is A, open systems!!

Step-by-step explanation:

all systems on earth are open, except for the earth itself.