variation

Variation refers to the differences found among individuals within a species or population. These differences can be in traits like color, size, or behavior and can arise from genetic factors, environmental influences, or a combination of both. Variation is essential for evolution, as it provides the diversity needed for natural selection to act upon, allowing species to adapt to changing environments over time. Understanding variation helps explain how living organisms evolve and thrive in different conditions, highlighting the complexity of life on Earth.