Urban areas developed subways, elevated trains, and streetcar systems because if all commuters rode in cars it would cause traffic jams and major traffic. It made it easier for people to move around in bigger cities.
        
                    
             
        
        
        
The correct answer is true. 
At the beginning of the firefighting practice in the 19th century, fire departments were considered as social organizations within the community they were located on. Being a firefighter was voluntary work and being a member was considered to increase your social status in your community. However, due to the "voluntary nature" of these institutions, there was an initial lack of organization in many of them. This led to low efficiency in the response to fires during the early years of firefighting. 
 
        
             
        
        
        
A main goal of the monarchs of Europe during the Age of Absolutism was to "<span>(2) centralize political power" but there were of course other goals as well. </span>
        
                    
             
        
        
        
Answer:
The inner planets ( mercury , venus ,earth and mars ) are closer to the sun, hence, the lighter substances such as hydrogen evaporated away. The remaining composition of the planets resulted in the formation of rocky, mountainous surface of the planets. Thus , gaining the name as ''TERRESTRIAL PLANETS ''.
Explanation:
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Refugees of Vietnamese people from the Vietnam War.