Answer:
HUAC was created in 1938. It's purpose was to investigate alleged disloyalty and rebel activities on the part of private citizens, public employees and organizations suspected of having Communist ties. They focused heavily on Hollywood and interrogated masses of actors, directors, writers, and musicians.
Explanation:
 
        
                    
             
        
        
        
 A vague pronoun reference cause confusion for the reader or listener by  “it makes the reader or listener take longer to understand the authors meaning” 
A pronoun is a word that can be used instead of a noun. A vague pronoun reference occurs when pronouns such as they, them, theirs, are being used without their antecedents.
When the pronouns are used without their antecedents, then this will being about a situation whereby the meaning of the sentence will then be unclear. A vague pronoun is when its not clear to who or what your pronoun is referring to. The reasons include a pronoun replaces an antecedent, the antecedent of a pronoun is not clear and the pronouns do not agree in number.
Learn about vague pronoun:
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12.LEGALISM
17. FILIAL PIETY
15.DAOISM
13.GENERATION
10.CURRENCY
18. I BELIEVE CENSOR NOT TO SURE
        
             
        
        
        
People want areas with lots of water for drinking, irrigation, and more. So, they would build more communities near bodies of water to meet these needs