Over the past few decades, earth scientists have developed the theory of plate tectonics. why is this theory useful?

Understand how the earth surface feature of the planet and its internal processes.

Explanation:

As the plate tectonic theory is essential for the study of the earth past, present and future evolution of the plate and is necessary as to find out the location of continents that arranged today in the world and theory was develops by the Alfred Wagner keeping in mind the proprietor of the earth like the earth internal factors that drive the surface features on the earth and thus it helps in order to understand the flow of the earth as an ecological system.

Cause of he different elevations  hope this ?