Given the question: Answer the following question given this paragraph: An earthquake is sudden ground movement. This movement is caused by the sudden release of the energy stored in rocks. An earthquake happens when so much stress builds up in the rocks that the rocks break. An earthquake's energy is transmitted by seismic waves. Q: What sudden ground movement is caused by the sudden release of the energy stored in rocks, which is transmitted in seismic waves? Choices: - eruption - sandstorm - quicksand - earthquake A:
The answer is:
earthquake