Which of the following populations receives energy from populations at each level of
the energy pyramid?

A. boreal owl
B. mushroom
C. red squirrel
D. Engelmann spruce

Option B. mushroom.

Explanation:

Mushrooms are decomposers. Decomposers are those organisms which feed on dead bodies of plants and animals. Mushroom is a type of fungi which grows on dead bodies and broken down their body to release nutrients. These nutrients is again used by the organisms in the ecosystem such as plants. It also helps in the cleaning of environment by removing the dead organisms.

gag reflex, poor dentition, gum retraction

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