Answer the following question given this paragraph: 

Lipids consist only or mainly of carbon, hydrogen, and oxygen. Both fats and oils are made up of long chains of carbon atoms that are bonded together. These chains are called fatty acids. Fatty acids may be saturated or unsaturated. In the Figure below you can see structural formulas for two small fatty acids, one saturated and one unsaturated.


Q: Both fats and oils are made up of long chains of carbon atoms that are bonded together. what are these chains called?


A:
fatty acids