Which term describes a community of organisms and their environment?

Which term describes a community of organisms and their environment?

• A. Ecosystem
• B. Habitat
• C. Population
• D. Niche

Answer: (A)

Think about how living things interact with each other and with their surroundings. An ecosystem is the whole system that includes the community of living organisms and the physical environment they inhabit, together with the processes that connect them—like energy flowing through food webs and nutrients cycling through soils and water. This combines both the living and the non-living parts into one integrated system. A habitat, by contrast, is simply the place or kind of place where an organism lives, not the entire network of interactions. A population is about all individuals of one species in a particular area, which doesn’t include other species or the environment. A niche refers to the role an organism plays—the resources it uses and how it interacts with others—within the habitat, not the whole system itself. So, the term that best describes a community of organisms and their environment is ecosystem.

Think about how living things interact with each other and with their surroundings. An ecosystem is the whole system that includes the community of living organisms and the physical environment they inhabit, together with the processes that connect them—like energy flowing through food webs and nutrients cycling through soils and water. This combines both the living and the non-living parts into one integrated system.

A habitat, by contrast, is simply the place or kind of place where an organism lives, not the entire network of interactions. A population is about all individuals of one species in a particular area, which doesn’t include other species or the environment. A niche refers to the role an organism plays—the resources it uses and how it interacts with others—within the habitat, not the whole system itself.

So, the term that best describes a community of organisms and their environment is ecosystem.