Steel plows... https://quizlet.com/120311605/apush-chapter-16-flash-cards/
The answer is C.
As a science website says, "Scientists think they know why the Ancestral Puebloans disappeared. The primary culprit, studies suggest, was a megadrought that would have made it impossible to grow enough food to feed the tens of thousands of people living in the region."
If you didn't know, drought represents the lack of rain.
Answer:
This is the Grand Canal that served to bring water from the south to the north of China. It served agriculture, navigation and trade purposes. The Great Wall runs from east to west in northern China. And the yellow line does not correspond to the course of either the Yangtze or the Huang He rivers.
Explanation:
Roosevelt dedicated millions of acres of farmland to national parks and nature reserves.
To plant a garden where they come from
