Yes, studying how mayfly population affects the number of trout in a stream is ecology.
Ecology seeks to unveil how different organism relate with one another as well as their environment.
Ecology is basically the study of distribution,abundance and relation of organisms and their interaction with their environment.
I don’t see any options to select from.
Identity, assimilation, tribal sovereignty, revitalizing native culture. There are more but I hope these help
C. They wanted to ensure that Japan would not fall to communism.