Which statement describes a digital signal used to store information? A. It includes sound waves you make.
B. It moves gradually among an infinite number of values.
C. It includes visible light waves.
D. It is easy to copy.
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The correct answer to this open question is the following.

Although there are no options attached, we can say the following.

Faults, folding, ridges, mountains, valleys, and volcanic arcs are formed when the plates move because they are the result of the collision of plates in the underground. Scientists have a name for this phenomenon. They called it subduction zones. Here the plates collide creating a formidable force that generates earthquakes. Subduction zones are regions on planet Earth when tectonic plates collide and form new physical structures. For instance, mountain chains are formed throughout the years after these tremendous collisions.