The actions of organisms in response to stimuli is called the behavior.
Step-by-step explanation:
The actions of an organism in response to a stimulus are called as its behavior.
In a reaction chain of reacting to an environmental reaction begins initially with a stimulus. External stimulus triggers the sensory receptors which passes the information to the nervous system.
The control system of the body, the brain processes the information and decides the response. The response signal is then transferred to the effector, which expresses the behavior.
The smell of food triggers a dog’s nose and passes the information to brain, which sends information to the mouth to secrete saliva and drool.