BREAD BAKING IN AN OVEN is an example of a chemical change.
In chemistry, there are two types of change, chemical and physical change.
A chemical change is a type of change in which new substance is formed. A physical change is a type of change in which no new substance is formed. Baking a bread in the oven is a chemical change because the bread that is obtained at the end of the day is very different from the flour and the sugar that were used to make it. All other options given in this questions are physical change because the original substance is not changed.
