What evolutionary process allowed Homo erectus to migrate to other continents?

The evolutionary process that facilitated the migration of Homo erectus to other continents is natural selection. Natural selection plays a crucial role in adaptation to different environments. As Homo erectus migrated, they encountered various ecological challenges and climates. Those individuals with traits better suited for survival and reproduction in these new environments would have had a better chance of thriving and passing on their genes. This process of selecting advantageous traits over generations promoted the spread of Homo erectus across diverse habitats, ultimately leading to their presence in different continents.

While concepts like genetic drift, geographical barriers, and climate adaptation are relevant to understanding evolutionary changes, they do not specifically address the mechanism that enabled directional movement and settlement of species in new territories in the way that natural selection does.