Which is one function of steroids?

a) waterproofing leaves and feathers

b) insulating and protecting bones and organs

c) serving as chemical messengers

d) providing energy storage

One of the functions of steroids is C. serving as chemical messengers.

First of all, you need to know what chemical messengers are. According to the definition, a chemical messenger "is any compound that serves to transmit a message." Steroids are compounds, and one of their functions is to signal molecules in order to activate steroid hormone receptors - that is to say, they send a message to these receptors in order to activate them.