Answer:
Semi-arid type of climate with little rainfall and vegetation cover
Step-by-step explanation:
The Great Plains refers to the large and flat extensive land areas covering the regions of the United States and Canada. It is comprised of the prairies, grasslands, and the steppes, having a distinct type of boundaries.
The climate now has changed a little after the invasion of the sedentary farmers and pioneers into these flatlands and is now suitable for carrying out agricultural activities at different places.
Before they came to these places, the climate was different. It was characterized by the occurrence of a semi-arid type of climate, where the moisture content in the air is comparatively less than the arid type. Due to this, there occurred a lesser amount of precipitation, not lesser than the deserts, and there was a lack of vegetation in these areas. There were fairly less number of trees in the initial period.