What do these two changes have in common?
cutting an orange
a sidewalk heating up in the sun

 - Both are only physical changes.
 - Both are caused by heating.
 - Both are chemical changes.
 - Both are caused by cooling.
Step 1: Think about each change.
Cutting an orange is a physical change. The orange gets a different shape. But it is still made of the same type of matter as the uncut orange.
A sidewalk heating up in the sun is a physical change. The temperature of the sidewalk goes up, but the sidewalk is 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.
A sidewalk getting warm in the sun is caused by heating. But cutting an orange is not.
Both are caused by cooling.
Neither change is caused by cooling.