which solution would most likely cause a plant placed in it to become firmer and more rigid?\n hypertonic\n…

Brief Explanations:

In a hypotonic solution, water moves into the plant cells by osmosis. This causes the plant cells to swell and become turgid, making the plant firmer and more rigid. In a hypertonic solution, water moves out of the cells and the plant wilts. In an isotonic solution, there is no net movement of water and no change in firmness. Osmotic is a general term related to the process of osmosis and not a specific solution type for this context.

Answer:

B. hypotonic