Final answer:
Migration is the regular movement of individuals or populations based on the availability of certain resources and environmental temperatures. It is observed in both animals and humans, with seasonal patterns and different purposes.
Step-by-step explanation:
Migration is the regular movement of individuals or populations each year during certain seasons. It is associated with moving from one area to another based on the availability of certain resources and environmental temperatures.
For example, many northern hemisphere birds migrate south each fall to areas where the weather is warmer and more resources are available. They then return north in the spring to nest. Some animals, like elk, migrate vertically by moving up the sides of mountains in spring as snow melts and back down in fall as snow returns.
Migration is an important characteristic of human behavior as well. People migrate for various reasons such as economic opportunities, refuge from political or social oppression, educational opportunities, health resources, family needs, or travel pleasure.