system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do single mountains like Mt. Fuji, or Mt. Kilimanjaro form, without other mountains forming as well?

I understan how mauntain rages form, but I don't understand how a single mountain can pop up without others accompanying it.
gpt
These are volcanoes. Mountain ranges are created by tectonic plates colliding and pushing one side up into mountain ranges. The mountains you're talking about are volcanoes which are created by multiple eruptions over the millenia.