What was the primary purpose of Spain in the new world?

The primary purpose of Spain in the new world was, to explore the land.

Explanation:

Spain's mission to build an empire in the New World began with the expeditions of a Genoan seafarer named Christopher Columbus (1451–1506), who convinced the Spanish royalty he could find a western route across the Atlantic Ocean to the Indies (Asia). He sailed west in 1492 and six months later landed on islands in the Caribbean Sea. Columbus mistakenly concluded he had reached the Indies and brought news of his new route back to Spain. In 1501, Amerigo Vespucci (1454–1512)

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."