Because it was getting to crowded in wooded areas
Because America started on the East coast. People were running out of room due to the large population and so they began to move inland, which happened to be West.
Life in the Caribbean can be hard. They migrate so they can get better lives.
Many people migrate to other countries in search of economic opportunity.
Many people outside of the West are restive about immigration issues. Countries in Europe have not advanced in this area as the West has.
so they can live a better life
Japan is a developed country.but that place has more chance to get earth quakes,sunamies etc.... so people migrate from japan
So that they would have something to eat. If animals migrate, the people who hunt them must migrate as well.
Drought and massive dust storms worsened economic conditions in the Great Plains.
We don't know who " these people " are so can't answer the question.
People don't migrate. Animals migrate. So, there are no patterns between humans and animals.
Because the gold rush in California was going on and everybody wanted some gold, also there wasn't many people in the west and the east and south was crowded so people moved to the west.
Birds that migrate generally do so on a North-South axis. Many birds that live on the Asian continent migrate throughout Asia. It would be unlikely, or "accidental," for birds from, for example, North America, to migrate to Asia.