Question

read the passage. then answer the question below.
coral reefs in indonesia have more than 1,500 species of fish. thats more fish species than anywhere else on the planet! these fish range from tiny pygmy seahorses to huge queensland groupers. pygmy seahorses live on a type of pink, bumpy coral that looks just like the seahorses skin. the coral provides the perfect camouflage.
some fish species, such as bigeye trevally, swim in schools. other species, such as the tasselled wobbegong shark, hunt alone.
on a coral reef in indonesia, a school of bigeye trevally make up which of the following? select all that apply.
a population
part of a community
part of an ecosystem

Explanation:

• A population is a group of individuals of the same species living in a specific area. A school of bigeye trevally (same species) in a coral reef in Indonesia is a population.
• A community is made up of all the different populations (species) in an area. Since the bigeye trevally population is part of the larger group of different species (like other fish, corals etc.) in the reef, it is part of a community.
• An ecosystem includes all the living organisms (like the bigeye trevally and other species) and their physical environment (water, rocks, sand etc.) in an area. So the bigeye trevally are part of an ecosystem.

Answer:

a population, part of a community, part of an ecosystem