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Animals in the wild often have to adapt to their surroundings in order to survive. This is known as adaptation.

Adaptation can involve many different changes, such as:

1. Physical changes: For example, the evolution of longer legs in birds to enable them to run faster and more efficiently on the ground.
2. Behavioral changes: For example, the development of social behaviors in primates to improve communication and coordination within groups.
3. Physiological changes: For example, the evolution of cold-resistant adaptations in arctic animals to survive in freezing temperatures.

These changes can occur over many generations, and can be driven by a variety of factors, including:

1. Natural selection: The process by which individuals with advantageous traits are more likely to survive and reproduce, passing those traits on to their offspring.
2. Genetic drift: The random change in the frequency of a particular gene or trait in a population over time.
3. Gene flow: The movement of genes from one population to another, which can lead to the exchange of genetic information and the development of new adaptations.

Adaptation is an ongoing process, and is essential for the survival and diversity of many species. It is a key part of the evolutionary process, and has shaped the natural world as we know it today.