Which item has a funtion that is similar to that of a cell membrane? a. swimming pool b. airplane engine c. water hose d. car door

The cell membrane secures the cell from the outer environment and keeps the cellular components safe inside. The cell membrane maintains the shape of the cell and controls what goes inside and outside of the cell. The water hose functions is similar to the function of cell membrane as it keeps the water inside, and prevents it from leaking, all the while maintaining its shape.

Hence, option (C) is the correct answer.