Answer:c hope it helps you
Explanation:
<span>Air pollution badly affects the health of an individual. Polluted air leads to viral diseases. so the answer is environmental </span><span />
Cardiovascular exercise is any exercise that gets the heart rate up and increases blood circulation. Cardiovascular exercise utilizes large muscle groups. Aerobic exercise requires to use large muscle groups rhythmically and continuously. These muscle movement over a sustained period of time keep the heart rate to at least 50% of its maximum level.
The answer that you are looking for is A. Nephrons
Transporting oxygen and Nutrients throughout our body.