Answer : Ecology is the study about the ecosystems which comprises of elements like living organism and non-living organism in the environment and they are divided into several stages
Explanation: Levels present in ecology are as follows:-
Ecosystem is the biological system in which organisms show the interaction between the environment and their self.
Organism are the smallest part of the ecological unit
Population describes the number of individuals present which are of same species .
Landscape is the surface that contains more than one ecosystems.
