Final answer:
Human activities, such as building reservoirs on fault lines and injecting fluids into faults, can cause earthquakes.
Explanation:
Earthquakes can be caused by human activities such as building reservoirs on fault lines, injecting fluids into faults, and nuclear explosions. These human-induced earthquakes result from changes in pressure and stress on the Earth's crust. While natural causes like tectonic plate movements also lead to earthquakes, human activities play a significant role in inducing seismicity.
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