Question

the inca people were successful farmers. when the weather in the andes was good, the inca harvested more crops than they needed. the inca built structures called colcas to preserve the extra food they harvested. this food could be used in case of emergencies. during which of these emergencies would the inca most likely need food from the colcas?
a drought that lasted many months
the death of an inca emperor
an earthquake that damaged a temple
an invasion by a foreign army

Explanation:

The Inca built colcas to store extra food for emergencies related to food production. A drought lasting months would affect crop growth, reducing food supply, so they'd need stored food. The death of an emperor, temple - damaging earthquake, or foreign invasion don't directly impact food availability like a drought does.

Answer:

a. a drought that lasted many months