20.

Lake Ecosystem Ocean Ecosystem
turtle seal
↑ ↑
A crab
↑ ↑
mayfly limpet
↑ ↑
algae seaweed

Above are two food chains, one from a lake and the other from an ocean. In these ecosystems, the organisms across from each other have similar roles. What organism would fit into space A in the lake ecosystem?
A.
crab

B.
lobster

C.
duck

D.
fish

1 answer

B. lobster

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