Economically, why was slavery commonly in the southern states but not the northern states

The south needed labor.

Explanation:

The South needed the slave population to grow labor- intensive tobacco, cotton, and rice.

dirty, contaminated water

contaminated food,

chlostrophobic living spaces,

mice infestation,

etc,

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation: