I believe the answer is: C. Decoration
In fashion, decoration refers to the external elements that added to the cloths in order to make it look more attractive.
In Victorian female Fashion for example, we could see the decoration resided mostly on the knee level to the chest level of the clothing.
convenience is your answer, quick service is when you get your food fast so if you think about it the food will not always look good,have everything, and be completely safe because it was made fast.
Answer: A. All the other shapes are organic
Hope this helps :)