The system is a group of proteins in the blood that attack pathogens that enter the body and kill them.

The answer on edge.nuity is complement system. Hope this helps you out :)

answer; i believe the correct answer is (anemia);

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: