It is saying how zoos can be like the natural world
Readers on "Winter dreams" sees the American Dream in action. It was a story about how a man moved from humble beginnings to moving up the ranks of the economic and social ladder due to his strong will. "The yellow wallpaper" is about experiencing change. It was one of the first and important example of feminist literature.
Answer:
Option C, REEFS IN PERIL
Explanation:
Peril word signifies threat or immediate danger.
Since the reefs are under threat of extinction. The best heading that can justify the endangered reef species is the "option C" i.e Reef in Peril.
However, the other heading like THE FUTURE OF THE REEFS, BENEATH THE AZURE WATERS LIES A LOST COLONY etc. are also apt but one would not be able to understand that here the author is talking about the reef in danger.