Why Birta Aboliation was felt
necessary at that time?

The expedient puting an end to the feudal system of. Using land without paying any revenue to the State. This would make feelings and a situation of equality among various classes of people.

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.