Answer:During 1989 and 1990, the Berlin Wall came down, borders opened, and free elections ousted Communist regimes everywhere in eastern Europe. 
Explanation: In late 1991 the Soviet Union itself dissolved into its component republics. With stunning speed, the Iron Curtain was lifted and the Cold War came to an end.
 
        
             
        
        
        
Answer:
<h2>Labor unions. In 1883, " The railroad industry" was responsible for creating the first system of time zones in the United States. This answer has been confirmed as correct and helpful.</h2>
Explanation:
<h2>_____________________(◕ᴗ◕✿)</h2>
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<em><u>PLEASE</u></em><em><u> </u></em><em><u>MARK</u></em><em><u> ME</u></em><em><u> BRAINLIEST</u></em><em><u> AND</u></em><em><u> </u></em><em><u>FOLLOW</u></em><em><u> ME</u></em><em><u> LOTS</u></em><em><u> OF</u></em><em><u> LOVE</u></em><em><u> FROM</u></em><em><u> MY</u></em><em><u> HEART'AND</u></em><em><u> SOUL</u></em><em><u> DARLING</u></em><em><u> TEJASVINI</u></em><em><u> SINHA</u></em><em><u> HERE</u></em><em><u> ❤️</u></em></h2>
 
        
                    
             
        
        
        
Balance between government and individual freedom is the constitutional principle supported by Amendment IV.
Option A  
<u>Explanation</u>:
The fourth amendment is about securing people's rights and freedom, the amendment is in regard to the protection of people from the state's actions that are not based upon the reason and probable cause the crime or any other kind of legal offence has been committed. It is to maintain individual safety along with national safety as a whole. 
Like after 9/11 National Security Agency (NSA) increased their efforts for public safety but without disturbing individual freedom. So, both these things are opposite to balance but are possible.
 
        
             
        
        
        
They are based on nomadic Hunter-Gatherer societies.