What great change took place in the american economy after the civil war

The Farmers lively hood was comprised because they didn’t have slaves to do the hard laboring anymore.

Explanation:

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.

answer; ha,ha,ha, corn on the cop;