Final answer:
The choices that indicate why someone would turn down a fifth slice of pizza after eating four slices.
Step-by-step explanation:
The subject of this question is Health. The question is asking about the choices that indicate why someone would turn down a fifth slice of pizza after eating four slices. The answer options provided include being full and not wanting to eat anymore, not liking the taste of the pizza, being on a diet and watching calorie intake, or being allergic to an ingredient in the pizza.
In this scenario, the correct choice would be 1) You were full and didn't want to eat anymore. After eating four slices of pizza, the person may feel satisfied and not have the appetite for a fifth slice.