The action where the coughing of one student causes others to do the same best illustrates the chameleon effect.
In the field of sociology, the chameleon effect can be described as the phenomenon in which people tend to copy or mimic each other unconsciously.
The chameleon effect occurs when one person copies anything such as an action, posture, manner, etc from the other person. Usually, the action copied is done unintentionally.
In the scenario mentioned in the question, the coughing of one student causes other children to repeat it. Hence, this is an example of the chameleon effect.
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