A) They come up to enjoy some time.
B) They lose weight at night.
C) They become buoyant due to accumulation of \[{{O}_{2}}\] as a result of photosynthesis.
D) They become light due to food material accumulation.
Correct Answer: C
Solution :
During day time, algae and other submerged plants float on water due to the process of photosynthesis. Due to this process, algae produces oxygen which gets trapped in bubbles and this can lift the clumps up to the surface. In night, this oxygen is consumed so, algae and other submerged plants sinks in water.
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