Answer:
Normative social influence.
Explanation:
Normative social influence is a type of acceptance and provides one reason as to why people are going along with group behavior. People often act purely to gain approval from others, although they don't necessarily believe in what they do. This is a normative influence on society which leads to the desire to gain approval or escape disapproval. As per the question, the child's action in accordance with the other students reflects the Normative social influence.
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Cryptography is the science and practice of safeguarding information through codes.
Information that someone doesn't want someone else to be able to understand is put into cryptography. This stops someone from being able to see the message and depending on what it is about, steal the information. This text is called cipher text.