mixing spices for the sauce slicing pepperoni for the topping spreading cheese on the pizza baking the dough to form the crust
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In making a pizza, which process involves a chemical change?
Possibilities:
- mixing spices for the sauce
- slicing pepperoni for the topping
- spreading cheese on the pizza
- baking the dough to form the crust

baking the dough to form the crust