Answer:
Medellín es el nodo regional economico por su generación de empleo. Esta ciudad presenta grandes proyectos de infraestructura y movilidad, del mercado inmobiliario, el turismo de eventos internacionales y el flujo itinerante de nuevos inversionistas.
Se fortaleció la internacionalización, lo que mejoró la inversión extranjera y la posicionó en eventos internacionales. Estas compañías invierten en ciencia, tecnología y desarrollo.
African slaves were imported to work in America because Africans were immune to some European diseases and experienced at European farming techniques.
B. Africans were immune to some European diseases and experienced at European farming techniques.
<u>Explanation:</u>
During 16th century, Spanish started to import many Africans as slaves to work in the European farm. Americans were prone to European diseases and they also demanded large pay for the work. Thus, the government decided to import slaves from Africa.
Africans were immune to European diseases and they had better experience in European farming techniques. The pay demanded by the African slaves was also less compared to indigenous laborers. So Africans were imported as slaves to work in Americans farm.
It was mainly developments in the "steel" industry that made important contributions to improvements in the transportation system in the United States during this time, since the major advancement in transportation was in the railroads, which were made from steel.
