Which of the following statements is true?

a)decomposition and weathering recycle matter in an ecosystem.

b)the total amount of energy in an ecosystem is always increasing.

c)primary consumers break down dead organisms into essential chemicals.

d)water is part of an open system, which means it must be continuously replenished in an ecosystem.

Option A

Explanation:

The process of decomposition and weathering recycles the nutrients in an ecosystem. Decomposition is the process by which the complex matter is broken down into simpler organic matter.

The weathering is the process by which the mountains are broken soil to form soil that recycles the salts and minerals into the soil.

just here for the other one bc they put up with u

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic