they shouldn't waste their time dancing rather than working
Slave owners would punish them by whipping them.
They would hurt the slaves.
The purchased them at slave auctions. Owners that had more slaves than they needed, and those bringing them from Africa would sell them at slave markets.
They bought them at slave markets and also bread them; children of slaves were regarded as slaves.
Ships from Europe would buy slaves from other slave owners in Africa (YES there were slave owners in Africa!) and then transport them into docks in southern states bordering the Atlantic. There owners from the States could buy or trade them.
Because they would get money.
It would probably mean death for the slave owners and a massive loss of profit.
They would buy new ones
Slave owners treated their slaves as property rather than as human beings, subjecting them to harsh living conditions, physical abuse, and forced labor. They had complete control over all aspects of their slaves' lives and often used violence and fear to maintain power and control. Slave owners sought to dehumanize their slaves in order to justify their exploitation and mistreatment.
They would work in the fields, clean the house, or care for the children
Slave owners would often hit slaves with whips, sticks, or other objects to inflict punishment or enforce control. The severity of the beating could vary depending on the offense committed by the slave and the temperament of the owner.
Slave rebellions and escape attempts were two things that slave owners feared, as they posed a threat to their control over their slaves and their way of life. They also feared the loss of property if slaves were to successfully escape or rebel.