Because farmers hoped that they would have a better and easier life for their families. There were more jobs in cities
The cattle would be brought to the railroad. Railroad would ship cattle to the east.
Bring cattle to the railroad would be called a cattle drive.
(Make sure and eat some good grub on the chuck wagon.)
Later spur lines would bring the trains, closer to the cattle, and the drives would be shorter.
A great western writer is name Louis La'Loumour. (Fiction stories, but utterly amazing.)
States Rights and Secession
Answer:
floods could cause the rivers to take down the towns around it
I believe the answer is: Saharan desert
In Hot Desert such as sahara, there is very few water source that organism can use to drink and replenish the fluid in their body, which is why not many animal can afford to cross the Saharan desert.
Camels is the only animal available that could store a Huge amount of water in their hump, which enable them to cross the desert for a very long time without needing to drink.