fall below something—(of a standard, etc.) fail to reach an agreed or required level:
- You should identify the reasons why your academic performance has fallen below expectations.
fall under something—
1. (of an item) be placed in the category mentioned:
- If a document falls under the physicianpatient confidentiality clause, then this section may be withheld from public viewing.
2. (of a person) be strongly influenced or attracted by smth.:
- Though she was no longer young, she was still beautiful and John immediately fell under her charm.