Answer:
The correct statements would be
- A. make oxygen available
- C. Transfers energy from sunlight
- D. Cycles carbon through the biosphere
Photosynthesis is the process by which green plants, algae, and cyanobacteria convert solar energy into chemical energy.
They are termed as producers or autotrophs.
The solar energy helps in light-dependent reaction of photosynthesis which generates NADPH and ATP. The oxygen is released as the byproduct of this reaction.
These are used in light-independent reaction of the photosynthesis in which a plant fixes carbon atoms obtained from carbon dioxide into food or glucose.
Thus, producers help in making oxygen available, transferring energy from the sunlight, and cycling carbon through the biosphere.