Answer: C) a freshwater plant put into sea water
Step-by-step explanation:
According to the given situation when the plant is removed from it's natural environment and placed into a body of water that contains a higher concentration of salt. The new medium will act as a hypertonic solution ( concentration of solute is more outside than inside the cell) this will lead to the loss of water from the plant cells and diffusion of salt ions inside the plant cells. This leads to the wilting of the plant.
The condition that mimics the given situation is C)a freshwater plant put into sea water. The sea water will become a hypertonic solution for the plant, as a result of which the water inside the plant cell will come out and salt will diffuse in. The plant may not survive under such conditions.