31. Why do arrows in a food chain-only point in one direction?

Because Energy flows through an ecosystem in only one direction. Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. Producers are always the first trophic level, herbivores the second, the carnivores that eat herbivores the third, and so on.

The answer is constant.

Bis the answerhope it