Organism traits are characteristics that define how an organism looks, behaves, and functions. These traits can be physical, such as size, color, and shape, or behavioral, like feeding habits and mating rituals. Traits are influenced by an organism's genetic makeup and can vary widely within a species, allowing for diversity in populations. Traits can also be affected by environmental factors, such as climate and available resources. For example, Darwin's finches exhibit different beak shapes based on the types of food available on their respective islands. Understanding organism traits helps scientists study evolution, adaptation, and biodiversity in ecosystems.