<span>The Gupta Empire took over after the Mauryans, between approximately 320 and 550 CE. The Gupta were much more decentralized than the Mauryans, and some of this led to their demise midway through the 6th century. The Gupta were also known for their architecture and literary prowess, with many important texts being canonized during their reign.</span>
        
             
        
        
        
Answer:
In simple words, Houston is called energy capital of the world because so much of the energy is produced in the city for all the country. However, due to rising pollution in the city, the Mayor wanted to start a campaign under which the city is to be termed as Energy Conservation Capital of the World.
    The meaning of the second term relates to the intention of the mayor in which she wanted to enhance the image of the city along with its standard of living. The conservative word depicts the responsibility of the citizens to use this important resource carefully. 
 
        
             
        
        
        
The followers of Benito Mussolini were called the 'Brown Shirts'. They were heavily indoctrinated into the fascist teachings of the party.
 
        
             
        
        
        
The fugitive slave law was meant to return slaves, who had escaped to the "free" North, back to the South. It was a compromise set up by previous agreement made most recently in 1850. The 1850 agreement was an attempt to amend slave laws, but still allow for slavery in the South, while allowing the country to further expand to the West. The North resented the law, because it denied slaves the freedom embodied in the North. The South resented it, because they saw it as their right to own slaves per the 1850, regardless of where the slaves were in the U.S. The slaves were deemed extremely necessary because of the requirement of slave labor in the vast agricultural networks in the South.
        
             
        
        
        
I think it's population and transportation but I'm not sure