Aristotle is famous for:
1. His contributions to philosophy (critique of Plato's theory of perfect forms in which he observed that true reality exists in exactly in the physical existence Plato rejected; philosophy based on direct observation and experience rather than abstract thought and reasoning, etc.)
2. His contributions to biology and the scientific method (observation based conclusions, his method for classifying organisms) 
3. His extensive writings on a wide variety of topics (including metaphysics, music, politics, and poetry)
and
4. His roles as the student of Plato and the personal tutor of famous leader Alexander the Great
        
             
        
        
        
The answer that best fits the blank provided above is the second option. We can say that democracy and republicanism are similar in the idea that both refer to people electing leaders and these people are trusted to make government decisions. 
        
                    
             
        
        
        
Answer:
Arab Empire
Explanation:
At its greatest extent, the Arab Empire controlled 3/4 of the Mediterranean region, the only other empire besides the Roman Empire to control most of the Mediterranean Sea.
 
        
                    
             
        
        
        
Answer:
No 
Explanation:
Congress can override a presidential veto, but is is not easy.
It takes a simple majority in each house of Congress to pass a bill for the president to sign.
Congress needs a two-thirds majority in each of the two houses in order to override the veto and turn the bill into law. 
 
        
             
        
        
        
Answer:
Radicalism can be defined as the actions and beliefs of people who advocate complete political reform. During 1890s to 1945, some radical groups had ties with two great political parties in America. The populist party  and the Democratic party.
Explanation:
The populist party called for the abolition of national banks, civil service reform, and government control of railways this was supported by William Jennings Bryan and some other leaders in the Democratic party.
Futhermore, some major trade unions were linked to the Democratic party like the American Federation of Labor.
The American Civil Liberties Union was formed in 1921 when more radical organisations were subject to violent attacks especially during world war 1, to protect immigrants that were threatened with deportation and American nationals  that were threatened with criminal charges.