자극 (Stimulation) refers to the process of provoking a response in an organism or system. It can occur through various forms, such as sensory input, emotional triggers, or environmental changes. Stimulation is essential for learning and development, as it encourages interaction with the surroundings and promotes growth. In psychology, stimulation can influence behavior and mental states. For example, sensory stimulation from sights, sounds, and textures can enhance cognitive functions and emotional well-being. Additionally, neurotransmitters in the brain play a crucial role in how we respond to different types of stimulation, affecting our mood and motivation.