Answer:
C. A car engine
Explanation:
Renewable sources of energies are those who can grow again, such as trees and plants, or that can always reappear, such as wind and solar energy. Nonrenewable energy, however, cannot be regenerated, like oil and coal, or are mined minerals.
3)The amount of air that mixes with the gas stream
I am pretty sure it is animal cells and plant cells considering I learned that last year in 6th grade
