Final answer:
Osmosis occurs when the solute concentration is lower outside the cell than inside, creating a hypotonic environment that triggers water to move into the cell to maintain homeostasis.
Step-by-step explanation:
Osmosis most likely occurs in cells to reach homeostasis when there is a low solute concentration outside the cell compared to a higher concentration inside the cell. This situation is described as a hypotonic environment, where the net flow of water is into the cell. The process aims to equalize solute concentrations on both sides of the cell membrane, helping to maintain the structure and function of the cell.