Answer F. Have a great day
Answer:
Coral reefs are under threat if atmospheric carbon dioxide levels continue to rise, new research has shown. When CO2 dissolves in the ocean, it raises the water's acidity level. This prevents a build up of calcium carbonate, which corals draw from seawater to build their skeleton
Explanation:
the correct answer is Local backyard bird feeders without food because that is what you are keeping the same and not changing
