Answer:
It is the interaction between living and non-living factors, in a given area.
Step-by-step explanation:
An ecosystem contains various organisms, including both biotic and abiotic factors, all of them interacting and contributing to the cycle of the ecosystem.
An example of an ecosystem would be a kelp forest;
Sea urchins eat the kelp, sea otters eat the urchins to prevent the urchins from destroying the entire kelp population.