Space, is what i would guess.
Answer:
the fish couldn't eat
Explanation:
some of the fish and plants feed off of plants out of water. by removing them, they lost their nutrients.
The condensation of water vapor formed the early oceans. It is an important part of the water cycle. It is easy to eliminate the other answers in this question. It can't be meteorites, living organisms, or nitrogen.
Answer:
Plants → Grasshopper → Snake → Mushrooms
Explanation:
Read it from the sun, then it points to the grass, then grasshopper, then snake, then mushroom.