Answer: J. The Industrial Revolution encouraged people to pursue jobs in cities.
Explanation:
The first and second industrial revolutions brought about many inventions and new processes for doing things such that Urbanization took hold fast as factories were built and production of many goods and services was ramped up. 
The effect was that many people left agriculture and went to the cities to work in these new factories and this led to the rural population of the United States steadily decreasing. 
 
        
             
        
        
        
Answer: the answer is A Bc someone said it was c an it was wrong it’s A trust me!
 
        
             
        
        
        
Answer:
the answer is B
Explanation:
Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.
 
        
             
        
        
        
They share similar characteristics or have similar number of valence electrons