The correct answer is "dessert". Ice cream is typically eaten as a dessert.
Let's break down why the other options aren't the best fit:
* Food: While ice cream *is* food, the sentence is looking for a more specific category.
* Meal: Ice cream is usually not a full meal, but rather part of a meal, or a separate treat.
* Dish: While ice cream can be served in a dish, the sentence is looking for the *type* of food, not what it's served in.
Therefore, "dessert" is the most appropriate choice.