The correct answer is option 3, "cyclonic storm." Kalbaisakhi refers to a specific type of storm that occurs during the summer months in the Indian subcontinent. These storms are characterized by strong winds, lightning, and heavy rainfall. They often result in significant damage to crops, trees, and infrastructure. Kalbaisakhi storms are commonly experienced in the states of West Bengal, Bihar, and Assam, and are known by different names such as Nor`westers or Boro. It is important to note that options 1 and 2 are incorrect as Kalbaisakhi has no relation to cropping patterns or rituals in Kerala. Therefore, the correct answer is option 3, cyclonic storm.