Rise: How do the empires of Ghana,
Mali, and Songhai compare?
Rise:
Contributions:
Trade goods/natural resources:
Social structure:
Decline/fall:

they helped change culture. The trades became more efficient. Socially there were less wars, and fights among the empires.

Explanation:

the dust bowl, otherwise known as the dirty thirties, was a huge dust storm that killed multiple (and i mean  multiple) farmer's crops, leaving them homeless, and foodless, and jobless. in california, there were 5.7 million residents, and the population shrank as mexicans were repatriated. however, when the dustbowl happened, a lot of people began to move to california. by 1940, 250,000 people had arrived. therefore, your answer would be  the population increased, massively.  i hope this !

explanation:

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes