Choose the best answer. four major topics written about in nonfiction are:

a. ideas
b. biography or autobiography
c. personal experiences
d. fantasy
e. humor
f. fables

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

the answer to your question is:

c. complementary base-pairing

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