What is the function of an exoskeleton?

a.) to enclose the body from the inside.
b.) to enclose the body from the outside.
c.) to enclose the internal skeleton.

B.) To enclose the body from the outside.

Explanation:

An exoskeleton is a hard protective framework that encloses the body of the animal or insect from outside. It is mainly composed of dead tissues. It includes the some types of integumentary tissues which gives a body a hard cover. It provides protection to the organism against microorganisms, and against predators. It can be found in both invertebrates and vertebrates. In invertebrates the exoskeleton is a part of shells of snails , corals and others. In the case of vertebrates the exoskeleton forms the part of hair, nails, claws and hooves.

oxygen +1 most likely