Fact 1: Steroid hormones are made of lipids, such as phospholipids and cholesterol.

Fact 2: Steroids Steroids are lipids and, more specifically, derivatives of cholesterol.

Given the two facts above, answer the question "Steroids are derivatives of what?" with the following options: 
- fossil fuels
 - kinetic energy
 - Pesticides
 - sensory neurons
 - cholesterol
 - layers of fat
 - acetic acid
 - bioaerosols


 

     cholesterol    