Stimulus is any change in an organism’s environment that causes the organism to respond. An example can be an animal that is cold has to move into the sun to get warm. Response is how the organism reacts to a stimulus and results in a change in behavior. An example can be getting a drink when you are thirsty. Plants also respond to their environment when they grow with the help of the sun which is called phototropism. There are two types of stimuli; external is a stimulus that comes from outside an organism. Internal is stimulus that comes from inside an organism. Animals respond to stimuli in two ways, a way that they learned which learned behavior. A way that they were just born with it which we call instinct. An example of a learned behavior can be a Lion teaching his puppies how to hunt for food, another can be teaching a dog a trick. An example of an instinct can be when an animal runs away from danger this a natural reaction for the animal to get away from danger and get to safety. Animals will find themselves a home or make a home because they need shelter to survive. Animals will naturally look for food and water. Is very interesting to learn about animals we always have them around us but sometimes we don’t understand some of their responses and actions. In this video that i found in you tube talks about what i was talking about in relation to stimulus and response.