This is a quiz on balancing overcalls.
The opponent on your left opens the bidding and this is followed by two Passes. Should you bid?
This is an area of the game that needs some understanding.
You don't want to allow the opposition to steal the deal at the one-level. In general, you should strain to bid, sometimes just to make the opener bid to an uncomfortable level.
However, there are risks involved with bidding - one being that you may allow the opposition to find a better spot.
You are relatively safe if you do overcall, though. You know that your right-hand opponent has seaweed, so you cannot be sandwiched between two good hands and thus can't be socked for zillions.
Note that a 1NT overcall is now much weaker than an opening bid (or a direct overcall); 11 to 14 being about right here.