Which of the following factors drives migratory birds from Siberia to India each year?

Migration can occur for a variety of reasons, including food availability, seasonal changes, and breeding. Many birds, such as Siberian cranes, migrate from colder regions to warmer climates during the winter in search of better climate conditions and food. Animal migration is a crucial aspect of the ecosystem and plays an essential role in maintaining the balance of various ecosystems. Migration is an important topic of research in the fields of ecology and conservation due to its significant impact on biodiversity and the environment.