11.

The inhabitants of Easter Island overused their resources, and


they moved onto house boats in the Pacific Ocean.


they adapted to using more aquatic resources.


their population crashed.


they moved to another island.

12.

When a body of water is lacking in oxygen, it is called a ______.


carbon dioxide zone


dead zone


fishing zone


hot zone

13.

All green buildings are:


made from recycled materials


use solar energy


energy efficient


painted green