What do these two changes have in common?
getting a haircut
cracking open a peanut

 - Both are only physical changes.
 - Both are caused by cooling.
 - Both are chemical changes.
 - Both are caused by heating.
Step 1: Think about each change.
Getting a haircut is a physical change. Your hair is shorter after a haircut. But it is still made of the same type of matter.
Cracking open a peanut is a physical change. The peanut shell breaks and the peanut falls out. Both are still made of the same type of matter.
Step 2: Look at each answer choice.
Both are only physical changes.
Both changes are physical changes. No new matter is created.
Both are chemical changes.
Both changes are physical changes. They are not chemical changes.
Both are caused by heating.
Neither change is caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.