Answer: i would say the answer is d
Chloroplasts
In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle—the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules. I have taken the test before
The answer is B.
Im pretty sure water is important for some organisms.
Important muscle electrical signals is the movement of charged material (ions) across cellular membranes in a limited area