Final answer:
Many savanna animals migrate in search of food and water as an adaptation to variability in their environment. Migration is the seasonal movement in response to resource availability, temperature changes, and mating needs.
Step-by-step explanation:
The savanna animals, such as elephants and rhinoceroses, have adapted to endure the challenges of their habitat, which includes the need to travel long distances to search for food and water. The correct term for this behavior is migration, which is a seasonal movement often in response to changes in resource availability. For example, wildebeests migrate over 1800 miles each year for access to rain-ripened grass. This migration can also be influenced by temperature changes and the availability of mates.
Animals show innate or facultative migration behaviors. Obligate migration happens for species that must migrate, while facultative migration occurs when animals choose to do so based on conditions such as food scarcity. Migration is an evolved adaptation and is part of survival strategies, balancing the high-energy cost and the benefits of accessing resources.