Final answer:
The land grants that included the right to demand labor or taxes from Native Americans were known as encomiendas. The encomienda system allowed Spanish settlers to have control over Native American labor in specific areas.
Step-by-step explanation:
The land grants that included the right to demand labor or taxes from Native Americans were known as encomiendas. In the Spanish colonies, the encomienda system allowed Spanish settlers, known as encomenderos, to have control over Native American labor in specific areas. While the encomienda system was intended to provide guidance and education to the Indigenous people, it often devolved into a form of forced labor resembling slavery.