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Mushrooms can survive well without light. Unlike green plants using photosynthesis, mushrooms use the compost they are growing in/on to get the enery they need.

The next question can be found by following this hint:

On and on you must go, to find the meeting point of the squirrel, the sparrow and the crow. Gathering under the Sibirsk sembrafuru (Pinus cembra) bows, they are friends and not foe.

Eager to learn more?

Fungi/mushrooms are responsible for a vast amount of the processes we see in nature. Much is yet to find out about them. Read here and here for more information.