Diffusion, osmosis, active transport. all of these are methods by which a cell
a. maintains homeostasis.
b. creates energy.
c. removes waste.
d. reproduces.

Correct A). Maintains homeostasis.  

Cell transport helps to maintain homeostasis by keeping the conditions inside the body in a normal range in the organism's cells.

Each and every individual cell must maintain homeostasis in order to survive. One of the way by, which cell maintains homeostasis by controlling the movement of a substance across the cell membrane.  

Active transport, osmosis, and active transport are the method of cell transport, which help to maintain homeostasis.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

it is either c or d and i know for sure it is not a or b