Organisms can have many reactions to different stimulants. One example would be chemotaxis, where organisms move in response to chemical gradients.
maybe the key terms ur looking for are behavoir or instinct
An organisms reaction to a stimulus is called RESPONSE.
All organisms respond to a stimulus. An example would be being startled by a loud noise. The noise is the stimulus and the reaction is you being startled.
A stimulus is not a reaction, a stimulus is what causes a reaction.
Because this question is so broad the broad answer would be a stimulus.
Biologically, anything that gets an organism's attention is a stimulus, and what it does is the reaction.
The stimulus for taste is chemical reaction.
A response.
What a plant or animal does after receiving a stimulus is an example of a reaction. If the stimulus is unexpected, the reaction is an involuntary one.
it mean a respond by the organism after receiving the stimulus.
A response.
complex reaction time is a stimulus response
The term for an involuntary reaction to an external stimulus is a reflex.