Final answer:
Birds migrate in response to environmental and seasonal changes such as changes in temperature and food availability. Migration is an evolved behavior where birds follow the same paths each year, guided by natural elements and landmarks.
Step-by-step explanation:
The movement of birds is called migration. The change in the pattern of movement of birds suggests various environmental and seasonal changes, which can include changes in temperature, food availability, and breeding needs. Birds and other animals migrate to overcome these changes and ensure their survival and reproductive success. For example, in the Northern Hemisphere, birds such as robins and geese migrate southward during the autumn to find warmer climates and more abundant food resources, then return north in spring for nesting.
Migration is an evolved behavior seen in many species, where they follow the same paths or flyways each year. These paths have been used for thousands of years, enabling species to thrive by effectively utilizing resources in different geographical areas. The migration routes are influenced by various factors, including landmarks, the sun's position, and prevailing winds.