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.
I believe it's because of the bacteria that decomposed algae which in the process consume oxygen
correct me if im wrong im not very bright at this subject but i try
here's a link to a website that could further help you
http://www.marinespecies.org/introduced/wiki/Possible_consequences_of_eutrophication
Answer: we can make observations directly by seeing, feeling, hearing, and smelling, but we can also extend and refine our basic senses with tools: thermometers, microscopes, telescopes, radar, radiation sensors, X-ray crystallography, mass spectroscopy, etc. And these tools do a better job of observing than we can!
