Location and conditions

While Earths plates are moving, it will create new mountain ranges and new islands possibly. For example, the Himalayas are the tallest mountain range in the world, but it will still grow because it is still, in earths history, very young. As the Indian plate collides with the Asian plate the Indian is less dense so it goes under the Asian plate, but as it goes deeper, the lands grow higher. The conditions of the other mountains might be pretty harsh cause if the mountain does not grow, then the extreme weather in the future might erode the mountain faster or in other words shrinking it till it's just a little hill. Probably most mountain ranges are caused by two plates colliding with each other.