Answer:
The correct answer would be photosynthesis.
Photosynthesis is the process by which occurs only in plants and not in animal cells. Rest of the processes can occur in both plants as well as animal cells.
It is the process by which plant cells synthesize their food (glucose) from simple substances such as carbon dioxide and water in presence of chlorophyll and sunlight.
Chlorophyll is an essential element for the process of photosynthesis which is present in plant cells but absent in animal cells.
