Question

which type of sweat gland becomes active during puberty and empties into hair follicles around the armpits and groin?sebaceous glandsmammary glandsapocrine sweat glandseccrine sweat glands

Explanation:

Apocrine sweat glands become active during puberty and empty into hair follicles around the armpits and groin. Sebaceous glands secrete sebum (oil) onto the skin. Mammary glands are related to milk production. Eccrine sweat glands are more widespread and not specifically associated with puberty - related activity in the armpits and groin in the way described.

Answer:

Apocrine sweat glands