Answer :
The processes of converting inorganic substances into organic substances are called carbon fixation. It can include C3 photosynthesis, C4 photosynthesis and CAM. C3 is least common in arid areas.
What is carbon fixation?
Carbon fixation is the process, when photosynthetic bacteria form organic carbon from inorganic ones.
Carbon fixation can have three processes as follows:
- C3: it is light independent process occurs in stroma it occurs in all plants but is less common in arid location plants.
- C4: it is found in plants of tropical areas.
- CAM: it occurs in plants present in arid areas.
Thus, option a is correct.
For more information about carbon fixation, refer
https://brainly.com/question/1219446