Geographic Conditions for Cotton

The climatic requirements mentioned—specifically the strict need for at least 210 frost-free days, moderate rainfall (50-100 cm), and bright sunshine—are the textbook conditions for cultivating Cotton. It is a sub-tropical kharif crop that thrives in well-drained moisture-retentive soils (like black cotton soil). Jute requires heavy rainfall; Sugarcane requires a long growing season with high water demands; Tea requires sloped topography and much higher rainfall. > One-line conceptual takeaway: The requirement of exactly "210 frost-free days" is the signature geographical identifier for cotton cultivation. Answer: (a).