your profile does not say where you are from but what about a comparison of business structure in Qatar and home country? maybe something close to all our hearts - the challange of moving / living abroad? If you are a local - how the transitional nature of Qatar effects business here.

If it is on anything pick something that is close to your heart and that you are confident in your opinions. Presumably they are just looking to see if you are a structured / organised person that can write clearly and argue your points in a methodical manner.