Final answer:
Justification is when a teacher provides reasons for an act, supporting the truth of a belief and providing understanding to actions or events.
Step-by-step explanation:
When a teacher gives explanations or causes for an act, this is called justification. Justification involves providing reasons in favor of the truth of a belief, thereby making it more likely to be true. It is a way of logically supporting a belief, and it helps to provide understanding and clarity to actions or events.