Answer:
1: Organism
2: Population
3: Community
4: Ecosystem
(the word bank literally gave it away)
Step-by-step explanation:
You can see that box 1 is next to 1 animal, so it's an organism.
You can see box 2 is next to a group of the same animals, so it's a population
You can see box 3 is next to a small group of multiple species, so it's a comunity
You can see box 4 is next to a fully functioning group of species, so it's called an ecosystem