I think it is called a Case study.
Hopefully it is correct! :)
"two ages o'er his native realm he reign'd"
Answer:
the fish couldn't eat
Explanation:
some of the fish and plants feed off of plants out of water. by removing them, they lost their nutrients.
Answer:
Peahens often choose males for the quality of their trains -- the quantity, size, and distribution of the colorful eyespots. Experiments show that offspring of males with more eyespots are bigger at birth and better at surviving in the wild than offspring of birds with fewer eyespots.