Fact 1: The Himalayas were formed by rock folding.

Fact 2: Mountains are formed from folds that bend upward.

Given the two facts above, answer the question "How are mountains made?" with the following options: 
- less water
 - magma
 - barrel-shaped
 - lava
 - earthquakes
 - calcite
 - Water expanding
 - rock folding


 

        rock folding 