The Zigzag shape of these mountains is evidence of what process happening in the Earth's crust as plate move.

Erosion
folding
subduction
deposition

The Zigzag shape of these mountains is evidence of the folding process happening in the Earth's crust as plates move.

Which feature provided evidence that a volcano existed in the past?

calderas
river
valleys
mountains

Calderas are the feature that would provide evidence that a volcano existed in the past.

connexus??