What are the cap stalk and underground hyphae are responsible for?

The cap stalk, or stipe, of a mushroom supports the cap (pileus) and elevates it above the ground, facilitating spore dispersal. Underground hyphae, part of the mycelium, are responsible for nutrient absorption and play a crucial role in the growth and health of fungi, as they break down organic matter and form symbiotic relationships with plant roots. Together, these structures enable fungi to thrive in their environments and contribute to ecosystem functioning.