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>
I'd say create a compost bin. Hopefully this was what you were looking for.
The atomic number of an element is the same as the number of protons in the nucleus of an atom
The unit of measurement in an ecological footprint is the global hectare.
