Final answer:
Migrating birds consume food to prepare for their migrations as an evolved, adapted response to variation in resource availability. Birds fly south for the winter to get to warmer climates with sufficient food.
Step-by-step explanation:
The best evidence to support the statement that migrating birds consume food to prepare for their migrations is the fact that migration is an evolved, adapted response to variation in resource availability. Birds fly south for the winter to get to warmer climates with sufficient food.
Additionally, the documentary March of the Penguins showcased the 62-mile migration of emperor penguins through Antarctica to bring food back to their breeding site and to their young.