Why are Prairies known as the Wheat basket of the world?

The soil and climate of Prairies are the most suitable for the cultivation of wheat and maize. So the production of wheat is so large that USA exports surplus wheat to other countries. Therefore, the Prairies of North America are called 'Wheat basket of the world'.

Because It's the leading geographical area in the production of Wheat.

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.