Verified Answer :


First
we have to understand that a food chain is a series of steps in which
organisms transfer energy by eating and being eaten. A food web is a
feeding relationship among the various organisms in an ecosystem that
forms a network of complex interactions. A food web links all the
food chains in an ecosystem.






Answer:
Grass, Grasshopper, Snake, Hawk.



I
hope this helps, Regards.

Answer:

Lesson 3: Movement of Energy in Ecosystems

Explanation:

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 trophic level.