Identify whether each case is an example of a push factor or a pull factor that encourages migration.pushpullMany immigrants came to America from Ireland to escape a famine.pushpullMany Chinese immigrants came to America to work in new jobs, like building the Transcontinental Railroad.pushpullMany Russian Jews migrated to America to escape harsh mistreatment.pushpullMany Scandinavians were encouraged to migrate by the land that the Homestead Act of 1862 made available.