Concept:The surroundings of an organism include all living and non-living things around it.Explanation:An organism is surrounded by both living (biotic) and non-living (abiotic) components.The total of these surroundings is called its environment.A community includes only the living organisms of an area.A habitat is the specific physical place where an organism lives.An ecosystem refers to the community and its non-living surroundings together with their interactions.Since the question asks about all living and non-living things around an organism, these together form its environment.Answer:C. environment.