a sugar cube dissolving in water. ice cubes forming in a freezer. ice cream melting in a bowl. a cake baking in an oven.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following represents a chemical reaction?
Possibilities:
- a sugar cube dissolving in water.
- ice cubes forming in a freezer.
- ice cream melting in a bowl.
- a cake baking in an oven.

a cake baking in an oven.