The answer is that the dinar will depreciate because the dollar will become stronger.
The rationale is that when exports fall, holding other factors constant (holding imports Constant), The circulation of the dollar in the Economy will also fall and remeber Kuwait needs the dollar to purchase good abroad. And now the point is that there are few dollars in the Economy and Many dinar. The demand for a dollar will go up and that of the dinar will fall hence depreciation of the loca;l currency.
The rationale is that when exports fall, holding other factors constant (holding imports Constant), The circulation of the dollar in the Economy will also fall and remeber Kuwait needs the dollar to purchase good abroad. And now the point is that there are few dollars in the Economy and Many dinar. The demand for a dollar will go up and that of the dinar will fall hence depreciation of the loca;l currency.