Final answer:
A checked significant concerns box must be accompanied by a detailed explanation or supporting evidence.
Step-by-step explanation:
In the context of a student's work, a checked significant concerns box must be accompanied by a detailed explanation or supporting evidence. This is important because it helps the reader or evaluator understand the nature of the concerns and provides clarity and context. For example, if a student is submitting a report on a historical event and checks the significant concerns box, they would need to explain what specific concerns they have about the accuracy or interpretation of the information provided.