Answer:
B) lipid is the correct answer.
Step-by-step explanation:
The cell is made up of a bilayer of phospholipids which is a type of lipid.
Phospholipids are the abundant kind of lipid located in the cell membrane.
The lipid double layer is a common component of all cell membranes.
It is composed of two components, a hydrophilic head, and a hydrophobic tail.
The hydrophilic head is composed of phosphate and glycerol.
The hydrophobic tail is composed of fatty acids.
Thus lipid type of molecule makes up the double layer of a cell membrane.