Cyclone is a sudden movement below the earth surface
Cyclones are strong revolving winds which travel at great speed
Cyclones are long dry periods when there is no rain
Cyclones is underwater earthquake or volcanic eruption
Answer: Cyclones are strong revolving winds which travel at great speed
Long Answer:
Cyclones are caused by strong revolving winds which travel at great speeds. They are especially dangerous in coastal areas where the temperature and pressure conditions of land become different from those at sea.
