The two correct answers are; The invention of the cotton gin and westward expansion. 
Further Explanation:
The cotton gin helped to take the seeds out of the cotton, but it increased the need for plantation owners to have more slaves. Since the work was done faster with the gin, they needed more slaves to keep up the work. This caused political debates to abolish slavery, but it still took a long time to get slavery abolished. 
The Westward expansion also increased the need for slaves. With so many people leaving the East coast, they needed slaves to help families cook, wash, and do many other things. This also got the political debates started and in the right direction, but it would still not end slavery altogether. 
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Answer:
The main concepts of this philosophy include Ru (humaneness), righteousness, propriety/etiquette, loyalty, and filial piety, along with strict adherence to social roles.
 
        
             
        
        
        
The correct answer is:
Texas and California were only sparsely populated before the 1820s.
 
        
             
        
        
        
FOLLOW AND TRUST IN GOD AND HE WILL MAKE A WAG WHEN THERE SEEMS TO BE NO OTHER WAY! JESUS LOVES YOU AND HE DIED FOR YOUR SINS DONT IGNORE HIM!!
        
             
        
        
        
<span>Palmer appointed Hoover as his special assistant so as a response to his fear, Hoover began to hunt down communists, socialists, and anarchists.</span>