Answer:
option c and b are the answers
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They are all located in the dermis.
A few things can include taking a hot shower before bed, make sure you've completed everything you needed to do for the day, and go to bed on the right time, a bad habit would probably be staying up late to watch a movie or something
Pollution is something that is harmful for our environment. We can prevent it by not driving so much or wasting stuff.
Hope this helps
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-Kayla <3