What is 3 examples of stimulus?

Stimulus refers to any event or object that can provoke a response from an organism. Three examples include: 1) Light, which can influence plant growth and animal behaviors; 2) Sound, which can elicit responses in animals, such as a dog reacting to a whistle; and 3) Chemicals, like pheromones, that can trigger specific behaviors in insects or mammals. Each of these stimuli can lead to various physiological or behavioral responses.