The answer is C) signal
Stimuli are changes in the internal or external environment that can be detected. That which impacts or induces an increase in physiological activity or response in the entire body or any of its sections.
Response to stimuli is a defining feature of life; it allows scientists to determine whether or not an organism has life. There are various additional ways to learn this, such as cell organisation, metabolism, and so on.
One of them is response to stimuli.
Stimulus is defined as anything that causes a response in your nervous system.
That could be a quick temperature change that makes you feel cold.
learn more about stimulus refer:
https://brainly.com/question/20117556
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