7. Briefly describe the (1) nationalities, (2) motivations for trade, and (3) Impacts of the following explorers: · Bartolomeu Dias, Vasco de Gama, Ferdinand Magellan, Christopher Columbus

Bartolomeu Dias - a nobleman of the Portuguese royal household, was a Portuguese explorer. He sailed around the southernmost tip of Africa in 1488, the first European to do so, setting up the route from Europe to Asia later on.

Vasco de Gama -  1st Count of Vidigueira, was a Portuguese explorer and the first European to reach India by sea. His initial voyage to India was the first to link Europe and Asia by an ocean route, connecting the Atlantic and the Indian oceans and therefore, the West and the Orient

Ferdinand Magellan - a Portuguese explorer who organised the Spanish expedition to the East Indies from 1519 to 1522, resulting in the first circumnavigation of the Earth, which was completed by Juan Sebastián Elcano.

Christopher Columbus - an Italian explorer and navigator who completed four voyages across the Atlantic Ocean, opening the way for European exploration and colonization of the Americas.

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d) the constitution rights of native americans and their right to self-government on reservations