Answer/Explanation:
The main process of a plant's food creation is centered around water, soil [+ nutrients in the soil], sunlight, oxygen, and temperature in the surroundings (which you probably know).
All of these factors are abiotic.
So, for a simple/quick explanation, the availability of resources changes what is available for a plant to create its own food. The difference in abiotic factors, therefore, changes if the food-making process is possible.
