Answer:
Light; Carbon dioxide; Temperature
Explanation:
Light; There would be no photosynthesis if light is not present. The rate of photosynthesis increases with light intensity up to the certain limit that plant needs for photosynthesis.
Carbon dioxide; Without carbon dioxide photosynthesis is not possible. The rate of photosynthesis increases with carbon dioxide level up to the certain limit that plant needs for photosynthesis.
Temperature; Too high temperature will denature the plant photosynthetic enzymes and photosynthesis will be too slow at low temperature
