Rice. Wheat.

 Here is a clean, exam-ready table showing the global wheat vs rice cultivation timeline:

Aspect	Wheat	Rice
First domestication (world)	~10,500–9,500 BCE	~9,000–8,000 BCE
Primary center of origin	Fertile Crescent (West Asia)	Yangtze River Valley, China
Early varieties	Einkorn, Emmer	Japonica, Indica
Spread to South Asia (India)	~7000–6000 BCE	~7000–6000 BCE
Spread to Europe	~6000 BCE	~300 BCE (via trade)
Spread to Africa	~5000 BCE (North Africa)	~3000 BCE (independent African rice)
Spread to Southeast Asia	Limited	~5000 BCE
Climate requirement	Cool, dry	Warm, wet
Major staple regions	West Asia, Europe, North Africa	East, South & Southeast Asia

If you want, I can also provide:

• A one-line comparison
• A memory trick for exams
• A simple timeline chart (text-based)