Translation:They have an appetite for french fries.
Two nations divided by a common language -- Winston Churchill
French fries = chips, chips = crisps, entree = main course, appetiser = entree and so it goes on. I am not suggesting Americans change their language, but perhaps Duolingo can accept the alternatives instead of marking them incorrect. They are often accepted in the German and French course.
I only mentioned it because Duo officially uses American English (which is why all the English courses from other languages use the US flag and a picture of the Statue of Liberty).
There is generally some effort put in by course makers to accept a bunch of other stuff (e.g. spellings like "colour"). So make a report that your answer should be accepted and, hopefully, they will update this sentence.