Răspuns:
1. Luca know it was an earthquake because his bed start shaking.
2. One of the causesof earthquakes might be fracking the process of drilling down into the earth to gas
3. In 1950-51 in Austria a avalanche happened called ,, The Winter of Terror,,
4. The main causesof avalanches are heavy snowfall, loud noises, vibration and increasesin temperature
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