Hello there I think you’re answer will be natural gas sorry if I’m late.
Plato Answer: volcanic activity and tectonic movement
Hope this helps, Have a great day!
Relating to mountains,with regard to position and form
Answer:
ooh yeh the river tees walls forms a barrage that divides the tees estuary and the catchment from the upstream, this helps stabilaze water levels for amenity purpose. so it you ask me how its been managed then:
the humans where the one to bring up the idea of
putting the barrage in there