Put the levels of organization of an ecosystem in order from smallest (1) to largest (4).

community

ecosystem

organism

population

1. organism

2. population

3. community

4. ecosystem

Explanation:

Let's define all these terms.

Community: the level where different populations of living organisms interact with each other

Ecosystem: the level where various communities of organisms interact with their nonliving environment

Organism: a single living thing

Population: a group of one specific organism

Observing these definitions, notice that a population is made up of organisms, a community is made up of populations, and an ecosystem is made up of communities.

Hope this helps!