The correct expression of approval is:

✅ 1. Super

Explanation:

• "Super" is a positive expression showing approval, admiration, or enthusiasm.

The other options are generally negative or exclamations of frustration:

• "Rotten!" – Negative, implies something is very bad

• "Damn!" – Often used to express anger, annoyance, or frustration

• "Hell!" – Usually expresses surprise, frustration, or emphasis, but not approval

So, "Super!" is the clear choice for showing approval.