Answer:
The Phospholipid head which contains a phosphate group
Step-by-step explanation:
The cell membrane contains phospholipids.
The Phospholipid bilayer is made up of phospholipids
Phospholipids consist of a hydrophobic tail (non-polar and is repelled by water)
It also consists of a polar head which is polar because it has a phosphate group which is negatively charged and therefore is hydrophilic (water-loving)