Answer:
tectonic forces, weathering and erosion.
Step-by-step explanation:
When two tectonic plates forces against each other, folded mountains are formed. They pushed together and compresses the boundaries and rocks and the debris are wrapped and folded into rocky and hilly mountains.
Jagged peaks are the sharp and pointed edges of the mountain peaks that are of irregular and uneven shape. Peaks are jagged due to strong weather conditions and weathering and also due to the tectonic forces and constantly pushes and pulls the mountains ranges. It is also caused due to the erosion by strong winds, rainfall, etc.
Therefore, it is not easy to see the folds of the mountains which are jagged by the effects of the weathering conditions, erosions and tectonic forces of the earth crust.