Making an ester linkage that links the fatty acid carboxyl groups to the hydroxyl groups in glycerol. There are two distinct kinds of fatty acids, saturated and unsaturated. In a saturated fatty acid, it has the most extreme number of hydrogen ions plausible, in this manner there are no dual bonds. There are just single bonds. Since saturated fatty acids are just single bonds, it can pack all the more firmly together at room temperature and this makes it a strong at room temperature. A perfect description of fatty acid is spread. An unsaturated fatty acid has one all the more dual bond. These dual bonds make a crimp in the hydrocarbon tail, which consequently brings about looser pressing. At room temperature, it is a fluid.
Phospholipids are found in natural membranes. The fatty acids give a hydrophobic boundary, though the rest of the molecule has hydrophilic properties. Phospholipids immediately shape lipid bilayers due to amphipathic nature of lipid molecules. Phospholipids are found in all cell membranes
So the answer to this question is fat.