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.

answer; i believe the correct answer is (favorable balance);

impeachment is when a president is committing treason or doing shading acts while in presidendcy therfor he can be impeached   by congress