Activators are substances or factors that initiate or speed up a chemical reaction. They can be enzymes, heat, or light, depending on the specific reaction. In biological systems, activators often help enzymes function more effectively, enhancing metabolic processes. In the context of psychology, activators refer to stimuli that trigger specific behaviors or responses. For example, certain environmental cues can activate memories or emotions. Understanding these activators can help in fields like behavioral therapy and marketing, where influencing behavior is essential.