I have a bad habit of chewing on my finger nails
In my opinion, the best answer among the choices listed above is option D. The reason why scientists use models because they can <span>represent things that are too small to see. Models are used to describe and explain certain phenomena. Hope this answers the question.</span>
A I believe because cars produce a lot of gas contributing to global warming
Energy is used to break down glucose in the presence of oxygen to produce carbon dioxide and water.
