Answer:
Forests
Explanation:
Forests have also sanitary influences upon environment due to the production of oxygen through photosynthesis.
The study of the environment is called ecology. There are two types of factors for an ecosystem and these are a biotic and abiotic factors.
The correct answer is light
The process of the formation of food by trapping the sunlight with the help of chloroplast is called photosynthesis.
According to the question, the most influential factor which affects the environment is light as all the plants directly depend on the light for the formation of food and all the other species are dependent on plants either directly or indirectly.
Hence, the correct answer is light.
For more information about the light, refer to the link:-
https://brainly.com/question/1388366
