Answer:
I think the answer is D) when one has a non-living specimen that is no thicker than a few micrometers
Let me know if I'm wrong
Answer:
Lead is the major pollutants of high-tech gadgets, occupying 40%, while other metals 75%.This is because Pb forms lager components of these gadgets.For example a desktop computer contains about 10 pounds of Pb.
The lead to recycle these material to prevent pollution is important.
Explanation:
