The correct answer is:
The encomienda system subjected native peoples to forced labor.
The greatest distinction of the Spanish colonies was the encomienda system, which subjected Native Americans to forced labor.
The encomienda was a Spanish labor system which, unlike the English or French, exploited the Indians for personal profits instead of using slaves imported from Africa. It rewarded conquerors with the labor of particular groups of subject people in the Spanish colonization of the Americas and the Philippines