Moviegoers will frown at and give dirty looks to loud children and their parents. This is an example of a

Negative sanction

Explanation:

This is an example of negative sanction. Negative sanction can be described as punishments that are given for violating norms. Negative sanctions could be given to defaulters in the form of embarrassing stares, disapproval, sarcasm, ridicule or by exclusion. When these movie goers give these looks and frown at these kids, this could cause embarrassments and also show signs of approvals to their noisemaking.

answer; the correct answer is (ethics);