Why was it so hard for people living in the southern states to earn money? ?

Ineed because i cannot find the answers anywhere

Which of these was not a key difference between northern and southern states at the constitutional convention? wanting to protect states’ interests vs. a government with strict rules having more, larger cities vs. having fewer, smaller cities wanting to protect agriculture vs. protect industries having many enslaved people vs. using less enslaved labor

Who gave the famous "i have a dream" speech at the march on washington?