Left-handedness refers to the preference for using the left hand over the right for tasks such as writing, eating, and throwing. Approximately 10% of the global population is left-handed. This trait is believed to be influenced by genetics and brain structure, as the brain's hemispheres control opposite sides of the body. Left-handed individuals may face challenges in a world designed primarily for right-handed people, such as using tools and writing instruments. Some studies suggest that left-handedness is more common among artists, musicians, and athletes, potentially due to different cognitive processing styles associated with left-handedness.