In the Köppen’s classification of climates, the letter 'w' represents:

Correct option is A

In Köppen's climate classification, the letter 'w' denotes a dry winter season. This is typically associated with climates where most precipitation occurs in the summer months, and winters are relatively dry. It is common in climates classified as Aw (Tropical savanna with dry winter) or Cw (Temperate dry winter).
Information Booster:
1. Köppen Climate Classification: A widely used system for classifying the world's climates based on temperature and precipitation.
2. 'w': Indicates a significant reduction or absence of rainfall during winter.
3. Aw Climate: Tropical savanna with dry winters.
4. Cw Climate: Temperate climates with dry winters.
5. Seasonality: Helps distinguish between areas with varying seasonal precipitation patterns.