The amount of water, the location of the plant, the pot of the plant, the soil of the plant, the amount of sun the plant gets, how frequently it gets watered. (some of these may be independent depending on what you are testing for.)
Answer:
As they produce food by the process of photosynthesis which cannot be done by anyone else. Plants use chlorophyll, CO2 and H2O in photosynthesis( which is a biochemical process). Plants became a cause of life on earth. Hence plants are the ultimate source of food on earth.
The abbreviation for adenosine triphosphate is ATP
