What was the primary cause of the proportional increase in slave holdings in texas between 1836 and 1845? a) the enslavement of mexicans and native americans b) the end of mexican regulations on slave importation c) the discovery that texas was suited for cotton growing d) the multiplication of the original slaves from the 1820s

B is true. The end of the Mexican regulations on the importation of slaves became when in 1835 the Texas Revolution began and therefore the declaration of the republic. That same year the new Texas constitution was ratified and it restored the status of slave to people of color.

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.