Environmental science is the study of

Environment and the ecology.

Explanation:

The environmental science studies various aspects of environment involving the living and non- living components and their interaction. The ecology is the branch of environmental science which deals with the study of ecology in which involves the interaction of living beings with their non-living physical environment and with each other.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.