ILL GIVE BRAINLY PLS IM BEING TIMED
How are mountains formed?
by plateaus caving in
by land masses being eroded
by Earth’s crust being uplifted
by rain carving out an area of land
Earth’s crust is pushed up in big folds or forced up or down in blocks. So your answer is "By earth's crust being uplifted." Please mark as brainliest, hope this helps!