What do these two changes have in common?
a banana getting ripe on the counter
deep-frying chicken

 - Both are chemical changes.
 - Both are caused by cooling.
 - Both are only physical changes.
 - Both are caused by heating.
Step 1: Think about each change.
A banana getting ripe on the counter is a chemical change. As a banana ripens, the type of matter in it changes. The peel changes color and the inside becomes softer and sweeter.
Deep-frying chicken is a chemical change. The heat causes the matter in the chicken to change. Cooked chicken and raw chicken are different types of matter.
Step 2: Look at each answer choice.
Both are only physical changes.
Both changes are chemical changes. They are not physical changes.
Both are chemical changes.
Both changes are chemical changes. The type of matter before and after each change is different.
Both are caused by heating.
Cooking is caused by heating. But a banana getting ripe is not.
Both are caused by cooling.
Neither change is caused by cooling.