Answer:
The bus boycott demonstrated the potential for nonviolent mass protest to successfully challenge racial segregation and served as an example for other southern campaigns that followed.
The March on Washington was a massive protest march that occurred in August 1963, when some 250,000 people gathered in front of the Lincoln Memorial in Washington, D.C. Also known as the March on Washington for Jobs and Freedom, the event aimed to draw attention to continuing challenges and inequalities faced 
The campaign used a variety of nonviolent methods of confrontation, including sit-ins at libraries and lunch counters, kneel-ins by black visitors at white churches, and a march to the county building to mark the beginning of a voter-registration drive. Most businesses responded by refusing to serve demonstrators.
 
        
             
        
        
        
C) laws of universal gravitation
 
        
             
        
        
        
Poitier was also the first black actor to win a prestigious international film award. With his unique career, Sidney Poitier helped change many stubborn racial attitudes that had persisted in this country for centuries. He has built the bridges and opened the doors for countless artists in succeeding generations.
 
        
                    
             
        
        
        
It means that it cannot be changed and that it is our rights. laws can be changed but the constitution cannot
        
             
        
        
        
Acts of Trade and Navigation
Explanation:
The Navigation Acts, or more broadly the Acts of Trade and Navigation, was a long series of English laws that developed, promoted, and regulated English ships, shipping, trade, and commerce between other countries and with its own colonies. The laws also regulated England's fisheries and restricted foreigners' participation in its colonial trade.