Answer:
B. improved methods of sanitation is the answer.
Explanation:
C. Excretion
Excretion is part of the excretory and really has nothing to do with the respitory system which deals with gas exchange.
Answer:
Running Is a very important physical activity. It is needed in everyday life, and it should be practiced to keep your body healthy. Younger children should run a lot, that's why sports are so encouraged in school.
Running can significantly improve physical and mental health. As a form of aerobic exercise, running can reduce stress, improve heart health, and even help alleviate symptoms of depression. Some researchers think running may be so good for us because it's something we evolved to do.
Even only running for 30 minutes is great for you. One 30 minute run is guaranteed to burn between 200-500 calories. That's a fantastic step forwards to your weight loss goal. Or a guilt-free guilty pleasure that day. Or splitting the bottle instead of having a glass.
Explanation:
