What is the process by which the Earth's plates move and change, resulting in the creation of mountains and volcanoes?
Correct: A
Plate tectonics is the process by which the Earth's lithosphere is broken into large plates that move relative to each other, resulting in the creation of mountains, volcanoes, and earthquakes. This process is driven by convection currents in the Earth's mantle and is responsible for shaping the Earth's surface over millions of years.