Here's why:
* Plate tectonics: Mountains are formed primarily due to the movement of Earth's tectonic plates. When plates collide, the immense pressure forces the land upwards, creating mountains. This is a building process, not a destructive one.
* Erosion: While erosion can wear down mountains over long periods, this is a separate process from their initial formation. Erosion is destructive, but it's not the primary force behind mountain creation.
Think of it this way:
* Building a house: Building a house is a constructive process. It involves adding materials and creating a structure.
* Weathering the house: Weathering and erosion are destructive forces that can damage a house over time.
Similarly, mountain formation is a constructive process, and erosion is a destructive force that can act on mountains after they are formed.
