What phenomenon do animals engage in during seasonal migration?

Animals engage in seasonal migration primarily as a means to move to areas that provide better conditions for survival and reproduction. This behavior allows them to locate food sources, suitable mating grounds, and climates conducive to their needs throughout different times of the year. For example, many bird species migrate south for the winter to escape harsh conditions and find abundant food.

The other options, while relevant to animal behavior, do not accurately describe the phenomenon of seasonal migration. Staying in one location for breeding relates more to site fidelity, where animals return to specific breeding grounds rather than migrating away. Storage of food for winter might be observed in certain species, like squirrels, but it does not encapsulate the broader behavior of migration. Lastly, changing colors for camouflage is a survival strategy used more for protection against predators rather than for the purpose of migration. Therefore, the correct answer highlights the essential reasons behind the movement of animals during seasonal changes.