Monomers are atoms or small molecules that bond together to form more complex structures such as polymers. There are four main types of monomer, including sugars, amino acids<span>, fatty acids, and nucleotides.
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Maybe because he feels uncomfortable at his new school and does not want to worry his Grandmother.
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Just a guess :(
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Check out this website it should help you
Explanation:
https://papersowl.com/blog/how-to-start-a-research-paper
It is b i think if that helps