Answer: A
Explanation:
Because both introduce substance that harm organisms. All the other ones are wrong because<em> eutrophication</em> is a natural process that involes little to<em> no human interference . </em>
The answer to your question is,
C. The tails are hydrophobic
-Mabel <3
<span>Embryonic stem cells
Tissue-specific stem cells
Mesenchymal stem cells
<span>Induced pluripotent stem cells
</span></span>
