Amore or less circular ring of mushrooms simultaneously appear in your yard,
apparently overnight. the circle is several yards in diameter. the most likely explanation
for this circle of mushrooms is:

a. mushroom spores were dropped by a circling bird, thus explaining the
circular shape of the group of mushrooms.
b. the mushroom plants in the center of the circle have been eaten by
herbivores.
c. the mushrooms are all part of the same plant, with mycelia radiating out
from the location of a germinated spore.
d. one mushroom in the circle reproduced sexually to make all the other
mushrooms in the circle.
e. a circle is nature's most perfect shape for asexual reproduction
structures.

The option that best explains this phenomenom is:

c. The mushrooms are all part of the same plant, with mycelia radiating out

from the location of a germinated spore.

Explanation:

Mushrooms belong to the fungi kingdom, which is characterized because its members are constituted by mycelia a single tissue that unites the different zones of the living being even when they are distanced. Mycelia unites them and it starts in the zone in which the spore was germinated. Also, they are all the same mushroom but grow separately. They are very alike to bacteria colonies because they grow almost in the same way. All united, however in fungi we only talk about a single living being, unlike bacteria which is a colony.

i believe it would be the lungs.