Why was whear a suitable crop to grow on the great plains?

You're likely thinking of wheat, not "whear." And you're right, wheat was a suitable crop to grow on the Great Plains for several reasons:

* Climate: The Great Plains have a semi-arid climate with hot summers and cold winters, which is well-suited for the growth of wheat.

* Soil: The soils of the Great Plains are generally fertile and deep, providing the nutrients wheat needs to thrive.

* Water: While the Great Plains are semi-arid, there is enough rainfall to support wheat cultivation, especially with the development of dryland farming techniques.

* Transportation: The Great Plains are relatively flat, making it easy and efficient to transport wheat to markets.

* Hardiness: Wheat is a hardy crop that can tolerate droughts and other harsh conditions common to the Great Plains.

However, it's important to note that wheat cultivation on the Great Plains also had some downsides:

* Overfarming: Intensive wheat farming practices can lead to soil erosion and depletion of soil nutrients.

* Dust Bowl: The overfarming of the Great Plains, coupled with severe drought conditions, led to the Dust Bowl in the 1930s, a devastating ecological disaster.

Despite these challenges, wheat remains an important crop in the Great Plains, and its successful cultivation has played a significant role in the history and economy of the region.