- A Mainly the living organisms present in an area
- B Mainly the non-living physical factors present
- C Living organisms and their non-living environment
- D Mainly the plant and animal species in a region
Correct answer: C. Living organisms and their non-living environment
Explanation: An ecosystem includes all living organisms (biotic) AND their physical environment (abiotic factors like water, temperature, soil).
Concept context
Levels of biodiversity, species richness patterns, threats (HIPPO), and conservation strategies. Always in NEET.