The process where organisms adapt to their environment over generations is known as evolution. Through mechanisms such as natural selection, individuals with advantageous traits are more likely to survive and reproduce, passing these traits to future generations. This gradual change can lead to increased fitness and adaptations, such as improved camouflage or resistance to disease. Evolution explains the diversity of life forms on Earth and is a cornerstone concept in biology. By studying evolution, scientists gain insights into how species respond to environmental changes.