Final answer:
The Moche civilization had a sophisticated irrigation system that supported their agriculture, allowing them to feed the population of a city. They practiced human sacrifice, as archaeological evidence from Huaca de la Luna suggests.
Step-by-step explanation:
The Moche civilization, which flourished along the northern coast and inland valleys of Peru from 100 CE to 750 CE, developed a highly productive agricultural system. Their knowledge of irrigation technology allowed them to sustain the population through the cultivation of crops like squash, beans, maize, and peppers. Contrary to being wiped out solely by disease or rejecting human sacrifice, the Moche civilization did practice human sacrifice, as evidenced by archaeological findings at the Huaca de la Luna site where sacrificed prisoners were discovered. The agriculture of the Moche was indeed productive enough to support a city's population.