Changes in the surroundings that make us respond to them, are called _____

Changes in the surroundings that make us respond to them are called stimuli. Stimuli can be any event, situation, or condition in the environment that causes a reaction or response from an organism. Examples of stimuli include light, sound, touch, taste, temperature, pressure, and pain. When a stimulus is detected by the sensory receptors in an organism, it is transmitted to the brain, where it is processed and interpreted, and a response is generated. The response can be a behavior, a physiological change, or an emotional reaction, depending on the nature of the stimulus and the organism's characteristics.