The essential aspect of geography where one would learn about the creation of mountains would be the study of plate tectonics. Plate tectonics and the theory of continental drift or the theory on the movement of plates and land masses seeks to explain the phenomena of mountain creation and also how continents are moving around the planet.
I've seen other people get killed. Some end up getting a ticket for driving while under the influence of alcohol. Some actually get into accidents.
D. When traffic signals are timed traffic seems to be less dense.