A region where the average temperature of the coldest month is $19^{circ}C$ belongs to which Köppen major group?

💡 Explanation:

The Tropical (A) climate group in the Köppen-Geiger classification is defined by having a mean temperature of $18^{circ}C$ ($64.4^{circ}F$) or higher in every month of the year, and it is not a Dry (B) climate. Since the coldest month's average temperature is $19^{circ}C$, which is above the $18^{circ}C$ threshold, it is classified as a Tropical (A) climate.