Which of the following best explains why human labor took on a greater importance to Andean civilizations than it did in other parts of the world? (A) There were not many large enough animals to use as beasts of burden. (B) Those who could not demonstrate adequate human labor were sacrificed in bloody rituals. (C) The land was not particularly fertile and therefore required greater efforts to create conditions for crops to grow. (D) Labor was seen as a great offering to the sun god.Explanation: As with earlier pre-Columbian American civilizations, there was a lack of large animals to use for agricultural labor. Therefore, (A) is correct.