B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
Answer: The Parietal lobe
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<span>Killer whales are much more common in highly productive cold water areas. These include the Atlantic, the Pacific Northwest, and the higher latitudes of the Southern Ocean.</span>
A plant and animal cell is eukaryotic
a eukaryotic cell has a nucleus instead of floating DNA which a prokaryotic cell has
