The presence of channels carved out on the slopes of Martian volcanoes is consistent with
A) recent wind erosion
B) the action of plate tectonics
C) the existence of past underground pockets of water
D) recent impacts

Question

Quizplus · Accepted Answer

The presence of channels on Martian volcanoes suggests the past existence of water. The channels were likely formed by melting water from underground pockets when volcanic activity occurred.

The Presence of Channels Carved Out on the Slopes of Martian