Answer:
D. by taking in oxygen and cleaning out waste gases like carbon dioxide.
Explanation:
The respiratory system cleans out your carbon dioxide and replaces it with oxygen.
It was not until the year of 1952!
Answer:
Renewable Energy
Pros: Cleaner than fossil fuel, an abundance out there, can be used without interruption
Cons: Takes alot of energy to produce, may be seasonal and competes with food production
Explanation:
If a planet exists near a distant star, the star may have a very slight back and forth motion.
