What is mostly the reason of an organism having lipids in its body

The most reason for an organism having lipids in its body is to provide energy to the body. The fat molecules in the lipids can supply more energy gram than carbohydrate molecules. The fat molecules are composed of carbon (C), hydrogen (H), and oxygen (O) atoms. I hope this will help!! Have a great day.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.