What is mentioned as a particularly relevant heading for analyzing sustainable projects?

Which of the follow is good way to gauge musculature endurance?

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Sweat glands that cause orders during puberty are present in the body from the time of brith