A Only one variable changed
Answer:
Osmosis: Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.
Explanation:
10 raise to 4 multiple by 1.8 is the answer
Theory because a theory has to be backed up by several experiments