Why do you think these processes influence the current geologic features (mountains, volcanoes etc) we have today?

The Earth as you know it today, with its seven continents and five oceans, is not as static as you might think. During a human lifespan changes are almost imperceptible. However, over hundreds of millions of years, our planet has undergone tremendous change, evolving from an alien landscape to the familiar layout we are comfortable identifying with today. Whereas some landscape features are due to erosion and weathering, the process of plate tectonics is responsible, not only for its overall characteristics such as oceans and continents, but also for landscapes such as mountain ranges, volcanoes, valleys, ocean trenches, islands, and plateaus.