A cell membrane is surrounded by fluid. A cell membrane is semipermeable. A cell membrane holds organelles in place. A cell membrane is found in plant and animal cells.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?
Possibilities:
- A cell membrane is surrounded by fluid.
- A cell membrane is semipermeable.
- A cell membrane holds organelles in place.
- A cell membrane is found in plant and animal cells.

A cell membrane is semipermeable.