Answer: Option E.
A biological community and its physical environment
Explanation:
An ecosystem is A biological community and its physical environment because an ecosystem comprises of the living community or biological community and the non living environment i.e physical environment interacting with each other.
An ecosystem also is a community that comprises of the biotic factors( living part) and the abiotic factors(physical or non living) parts.
Examples of physical or abiotic components are wind, rain, temperature, soil, humidity, latitude e.t.c.
The biotic components comprises of the living organisms.
