Sequence is extremely important especially in chronological order. Chronological order is the arrangement of things following one after another in time just like how people organize documents and biographies.
Many of the runners ____ incredibly fast.
The subject is "many" and many is plural.
Has would be wrong because you need a linking verb (the predicate is an adjective)
"Is" would be wrong because the subject is plural and "is" corresponds to a singular subject.
"Was" is incorrect because "was" corresponds to a singular noun.
Therefore "are" would be correct because it is a linking verb that corresponds to a plural noun.
sociology is thestudy of human behavior
SO B