Which of the following makes the best analogy to describe the movement of energy in an ecosystem?
a. pool
b. lake
c. river
d. pond

I know the answer is C.River

1. B.Grass, grasshopper, snake,hawk

2. D.Eliminated as heat

3.C.River

4.A. Biomass at the fourth trophic level is approximately ten times smaller than biomass at the third trophic level.

i think the answer would be d

nucleus

would be most reasonable answer tbh