its obviously not child labor or economy based because those have nothing to do with the environment so its the other three.
Answer:
A community
Explanation:
In ecology, a community is used to describe a group of organisms of different species populations that live and interact together at a particular time in a common habitat or ecosystem.
The two cardinals, colony of ants, a wasp’s nest, two squirrels, and the millions of bacteria represent a community of different organisms dwelling at the backyard tree.
Earth's service would be bare. There would no longer be life and all water ways would become dried up due to the intense ultra-violent rays of the sun.