Answer:
B.  Places and regions
Explanation:
Here are the six essential elements of geography;
1) The world in spatial terms
2) Places and regions
3) Physical systems
4) Human systems
5) Environment and society
6) The uses of geography
Geography is the investigation of the physical highlights of the World's surface and air, including how people influence them, and the manners in which they influence people. The subject can be separated into six essential elements which are mentioned above.
 
        
                    
             
        
        
        
Answer: B. Authorized Congress to implement a graduate income tax 
Explanation: The Sixteenth Amendment (Amendment XVI) to the United States Constitution allows Congress to impose an income tax from any source without alotting it among the states on the basis of population. 
 
        
                    
             
        
        
        
Answer:
The decision strengthened the institution of slavery.
Explanation:
 
        
                    
             
        
        
        
Involvement in the extremism of terrorist organizations that took place in the September 11th attacks on the united states is the result of group polarization.
Group polarization is a phenomenon of polarizing the attitudes and decisions of individuals member to an extreme level rather than being average. It is primarily about making extreme decisions in the group in order to stay unique and different which proved to be very dangerous for society in the nearby future.
persuasion and comparison are two factors that involve and determine how group polarization works: persuasion states that individuals in the group try to persuade others with the most information supporting it and members in the group compare their views with others or changes in order to fit in or look favorably happened mostly in terrorist organizations.
To learn more about group polarization, follow the below link:
brainly.com/question/27344881
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