Room With No Doors or Windows?

This page is the CodyCross answer for the clue below from Taking Care of Our Planet, Group 1564, Puzzle 5 (Natural Resources).

Question is: Room With No Doors or Windows?

and the answer is: MUSHROOM

Word Meaning:

MUSHROOM — Any of the fleshy fruiting bodies of fungi typically produced above ground on soil or on their food sources (such as decaying wood).

Definitions from Wiktionary.

Room With No Doors Or Windows? - Taking Care of Our Planet CodyCross Answers | CodyCross Solutions