Because it was getting to crowded in wooded areas
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
Drought and massive dust storms worsened economic conditions in the Great Plains.
So that they would have something to eat. If animals migrate, the people who hunt them must migrate as well.
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.
Arctic is very cold so people woun't live there.
It depends on what time of the gold rush. In the Early Gold rush, not many people were settled there so there were mounds of gold everywhere and were very easy to spot. Later in the gold rush, the news of gold spread quickly and more and more people migrate to the west to claim their riches. As more people came mining for gold the harder it became to find gold and not much were left tofind. People mostly found little nuggets.