Final answer:
The theory that explains the continuous movement of land and the formation of volcanoes, mountains, and mountain ranges is called plate tectonics.
Step-by-step explanation:
The theory that suggests that all pieces of land are continuously moving and interact in various ways, thus producing volcanoes, mountains, and mountain ranges is called plate tectonics.
According to this theory, the Earth's outermost layer, known as the lithosphere, consists of several large and small tectonic plates. These plates are constantly moving due to the movement of the underlying asthenosphere, a semi-fluid layer of the Earth's mantle.
As these plates interact with each other, they can collide, move apart, or slide past each other, leading to the formation of various geological features such as volcanoes, mountains, and mountain ranges.
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