Answer and Explanation:
When there is limitation to resurces, there are behavioural activities that organisms perform like clustering, coiling, burrowing, migration, hibernation and aestivation.
Migration is seen in many homoitherms where there is movement over long distances to avoid unfavourable climatic factors and food shortage. During cold weather, large mammals survive by hibernating. They go into deep sleep and metabolic rate falls to the minimum required for maintaining the vital activities of the cells.
