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The correct answer is option 4: cyclones.
Nisarga, Gati, Nivar, Tauktae, and Yaas are names of cyclones.
Cyclones are large-scale weather systems characterized by low atmospheric pressure, strong winds, and heavy rain. They form over warm ocean surfaces and are classified based on their wind speeds. Cyclones can cause significant damage to coastal areas, including flooding, strong winds, storm surges, and landslides.
The names given to cyclones are decided by regional meteorological departments or international organizations such as the World Meteorological Organization (WMO). The names are typically selected from a pre-determined list and assigned in alphabetical order. This helps in easily identifying and tracking cyclones in different regions.
Therefore, Nisarga, Gati, Nivar, Tauktae, and Yaas are names assigned to cyclones that have occurred in various regions.