Answer:
the Roman empire fell for many reasons, but the 5 main ones were invasions by Barbarian tribes, Economic troubles, and overreliance on slave labor, Overexpansion and Military Spending, and Government corruption and political instability.
(Gave information from teen link) 
 
        
                    
             
        
        
        
Answer:
Muslims started invading their lands and waging wars which obviously they were not okay with 
Explanation:
 
        
             
        
        
        
Judicial Review gives the Supreme Court the power "<span>A. to review acts of congress and the president to decide if they are constitutional," since this is one way the Court "checks" the other branches of government. </span>
        
                    
             
        
        
        
The Einsatzgruppen were used by the military to gather Jews nearing the end of the war
        
             
        
        
        
The economic activity that was considered as profitable for
Spain and sometimes or often the most hazardous or dangerous for the workers is
mining. Spain has abundant reserves of uranium, lead, mercury, tungsten,
fluorspar, magnesite, sepiolite, gypsum,
nickel, iron, natural gas and crude oil. This is the reason why Spain is
considered profitable when they include mining as their economic activity.
However, the side effect of this activity
is that it is not safe for those who are working in the mine.