Answer:
the gas bladder in fishes as it can help them to maintain their buoyancy in water
Because, it is the process by which they make or produce their food with the help of sunlight, water and carbon dioxide.
If photsynthesis is not there then there would be no production of food and ultimatley plants will die.
The answer to your question is,
D. Four haploid daughter cells.
-Mabel <3