Question

the word violation means \the act of breaking a rule or law.\ which an example of a violation? not buying a school yearbook not joining the tennis team not following the school dress code not missing class all year

Explanation:

The word "violation" means breaking a rule or law. Not following the school dress code is a rule - breaking action. Buying a school yearbook and joining the tennis team are usually optional activities, not rules. Not missing class all year is following the rule (attendance rule in a positive way).

Answer:

not following the school dress code