What is one reason early humans migrate across the beringia land bridge?

Following migrating prey. As the climate changed and the landscape shifted, early humans followed their food sources across the Beringia land bridge. For example, as the glaciers receded, herds of mammoths and other large mammals moved northward, and humans followed them. Additionally, the land bridge provided access to new resources and habitats, such as the rich coastal resources of the Pacific Ocean.