Answer: C
Explanation: Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive. The higher the surface area to volume ratio they have, the more effective this process can be.
<span>See which one is attracted more to the metal filings.</span>
The answer would be letter C
Answer:
D. Organic Matter is the correct answer
