How does the effect of photosynthesis affect the plants which absorb to little or less photons then usual

In the process, they produce oxygen, which constitutes a significant portion of the air we breathe so less plants means less recycling of carbon dioxide and less oxygen production. Plants also give us food and fibers to make clothes and without photosynthesis, we would not be able to sustain the life we are living.

i think that it is plants

i believe the answer would be b. hope it : )