How are Mountains and Valleys formed?

Question

How are Mountains and Valleys formed?
Good question. I here to help you all.
Mountains and Valleys are formed by strong steams, which over time have cut down into the rock through a process called downcutting. These Valleys form in Mountains and/or highland areas with steams in their ¨youthful¨ stage. At this stage, streams flow rapidly down steep slopes.
                I hope this can help the people who are in
                trouble.
                                              Love,
                                                      Auntie Charli´

Anonymous · Accepted Answer

The mountain might have gotten there by one plate sliding under another and pushing the upper one up (India sliding under China ---> Tibet) or a volcanic eruption

Auntie Charli´ · Answer

That could also be true and helpful to other people too.

koi · Answer

thank you!