Answer:
D
Step-by-step explanation:
Proteins are not made of lipids chained together but rather of amino acids chained together. Lipids are made of fatty acid chains joined to various molecules - like glycerol and phosphate that make phospholipids - Phospholipids make up the cell membrane of most cells. Fats are deposited under the dermis of the skin for insulation and this layer is thicker in animals that live in the cold regions. During starvation, these fats are taken from their reserves and broken down to provide energy for the body.