What does it mean for the Indian subcontinent that seasons are determined by rainfall?

In the Indian subcontinent, the reliance on rainfall to determine seasons significantly impacts agriculture, economy, and daily life. The monsoon season, characterized by heavy rains, is crucial for irrigation and crop production, supporting the livelihoods of millions. Variability in rainfall patterns can lead to droughts or floods, affecting food security and economic stability. This dependence on monsoon rains also shapes cultural practices and festivals, reflecting the region's deep connection to its climate.