Question

wallway is a new general herbicide for aquatic plants. its main ingredient is a marine salt solution. it is effective against freshwater but not saltwater plants. it works by breaking down the cell walls of the plants. the freshwater plants die because their cells: swell and cease to function shrink remain the same size but malfunction are crushed by the weight of the plant

Explanation:

When the cell walls of freshwater plants are broken down by the marine salt solution (hypertonic environment), water moves out of the cells by osmosis. Osmosis is the movement of water from an area of lower solute concentration (inside the cell, since it's freshwater plant cell) to an area of higher solute concentration (the surrounding marine salt solution). As water leaves the cell, the cell contents (cytoplasm, organelles etc.) shrink.

Answer:

Shrink