Question

the effects of aging on the skin include
a decreased number of sweat glands.
an increased blood supply to the dermis.
thickening of the epidermis.
a decline in the activity of sebaceous glands.
increased production of vitamin d.

Explanation:

As people age, the number of sweat - glands decreases. Blood supply to the dermis decreases, epidermis thins, sebaceous gland activity declines, and vitamin D production decreases.

Answer:

A. a decreased number of sweat glands.