Here's why:
* Tectonics refers to the large-scale movements and forces within the Earth's crust. These movements create and shape the Earth's surface, forming mountains, valleys, and ocean basins.
* Structure implies the arrangement and organization of parts that create a whole.
Therefore, "structure" captures the essence of tectonics as it relates to the formation and organization of the Earth's surface.
While other words like "geology", "geophysics", or "movement" are related, they don't fully encompass the concept of tectonics as "structure" does.
