The process in which the floors of a building collapse on one another is known as
a. earthquake panic.
b. earthquake shakedown.
c. a landslide.
d. pancaking.

The process in which the floors of a building collapse on one another is known as pancaking. The answer is letter D. Pancaking or pancake collapse is also called progressive collapse. It is due to the weakening of the primary structure which results in the supporting structure to fall down resulting in the failure of components.

answer; i believe that the correct answer is (the explosion of a nearby star(supernova);

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