Cyclones are major subunits of extratropical weather and frequently lead to intense events like wind storms and a tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. So the answer is A.
Tropical cyclones, hurricanes or typhoons form when convection causes warm, moist air above the ocean to rise. They begin as a group of storms when the water gets as hot as 80 °F (27 °C) or hotter. <em>The Coriolis effect</em> made by the Earth's rotation causes the winds to rotate.
The Coriolis effect refers to how a moving object seems to tilt toward the right in the Northern hemisphere and left in the Southern hemisphere. An example of the Coriolis effect is hurricane winds turning left in the Northern hemisphere.
Tropical cyclones can be found in the Atlantic Ocean and northeastern Pacific Ocean, and sometimes in the northwestern Pacific Ocean.
