The correct answer would be C. Polluting a river is an example of a human activity that is harming a renewable resource. Renewable resources are resources that are not depleted with time. They are replaced naturally and repeatedly. Examples of these resources are water, oxygen, biomass and solar energy.
Charles is an engineer who is evaluating a prototype of an artificial heart. He should notice the prototype missing is : a structure that would divide the hollow heart into chambers to separate oxygenated blood from deoxygenated blood.
stomach villi and blood distribute food
