An ecosystem includes all the living organisms (plants, animals, fungi, bacteria) in a specific area, as well as the non-living components of their environment (like soil, water, air, sunlight).
Here are some other related terms:
* Biotic factors: The living components of an ecosystem.
* Abiotic factors: The non-living components of an ecosystem.
* Habitat: The place where an organism lives.
* Niche: The role an organism plays in its ecosystem.