Like you might have studied. Heated hair expands while colder air contracts. So, the sound isn't able to move as efficiently in cold air than it would in warmer air.
B is the correct answer due to the fact that applied sciences means adding to already developed technology there scientist are creating another drug to cure human diseases by mixing different elements through the process of an experiment
<span>One cell becomes two cells that have different copies of DNA.
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Hope this helps!
-Payshence xoxo
Answer:
increase ozone in the stratosphere
Solar power is the answer