Answer:. d.The head groups are repelled by the hydrophobic membrane interior.
Step-by-step explanation:
The fluid mosaic model explains structural components biological membranes (plasma membrane).
The keywords in the model are fluid, mosaic and model.
The fluid - shows that it components are always moving, not solid
Mosaic - collection of things stuck together
Model - representation of real life
The definition of the model is fully described from the keywords in the terms above. Phosopholipids, cholesterol and proteins form a mosaic (pattern) within the cell membrane.