A community is a very large ecosystem. An ecosystem is a very large community. An ecosystem includes a community and abiotic factors. A community includes an ecosystem and abiotic factors.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the relationship between an ecosystem and a community?
Possibilities:
- A community is a very large ecosystem.
- An ecosystem is a very large community.
- An ecosystem includes a community and abiotic factors.
- A community includes an ecosystem and abiotic factors.

An ecosystem includes a community and abiotic factors.