Question

building collapsed at the foothills of the Himalayas because of an earthquake before collapsing they were moving forward and backward

Answer 1

Yes, the statement is true but before collapse, they were moving forward and backward, it may not be true at all. Earthquake is actually the shaking of the Earth's crust.

Answer 2

Earthquakers happen when tectonic plates start moving against one another, causing vibrations and movements of the earth, literal movements.

One tectonic plate goes one direction, while the other goes to another direction, result in a massive release of energy and the reason why the land seems to move back and forth and shake during a quake.

Himalayas are a very active earth quake area where an important tectonic plate lies

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