What do these two changes have in common?
water freezing into ice
a rock heating up in a campfire

 - 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.
Water freezing into ice is a change of state. So, it is a physical change. The water changes from solid to liquid. But the ice is still made of the same type of matter as the liquid water.
A rock heating up in a campfire is a physical change. The temperature of the rock goes up, but the rock 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 rock heating up in a campfire is caused by heating. But water freezing into ice is not.
Both are caused by cooling.
Water freezing is caused by cooling. But a rock heating up in a campfire is not.