How did most people earn a living in the north during the 1800

The Northern region of US was well developed and more advanced then the Southern region of the states. As there were industries in the region who provided growth and development in the region.

Explanation:

America in the 1800:

The American region was very different back then, as the Southern region was more dependent upon the agricultural resources and they wanted the slaves for better growth and productive by working in the plantations.

While, in the Northern region of the US there were people who worked in the industries and wanted the socioeconomic growth of the country.Many people in the North were opposed to slavery, as they wanted a free and prosperous region.

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.

there are indirect ways of affecting state laws   by with holding funding's. and that's why we have a 55mph speed on the high way with a design of 70mph speed.