I am all of the living and nonliving things in a
certain area. What am I?

I am what organisms must go through to obtain
a resource that is available in a limited supply.
What am I?

I am the relationship between two kinds of
organisms that lasts over time. What am I?

I am any nonliving part of an ecosystem.
What am I?

I am the role that a species has in a community.
What am I?

I am any living thing in an ecosystem. What am I?

I am all of the populations in a certain area.
What am I?

I am all of the organisms of the same kind that live
in a particular area. What am I?