Your question has been heard loud and clear.
Not all scientific laws explain how and why something occurs on a scientific level , only scientific theories explain how and why something occurs on a scientifc level.
So , it is false.
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I think the answer would be B.
A mixture can vary in composition, but a pure substance has a set composition.
Decomposer are the tiny organisms that break down and absorb nutrients from dead organisms
Answer:
2.carbon nanotubes for stain resistant clothes
Explanation: