According to bartolome de las casas what factor motivated the colonists treatment toward the natives

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

Use the following words in sentences • siege •ratify •ambush

Which statement is true of both presidential and parliamentary systems of government?