What do these two changes have in common?
ice melting in a cup
pouring milk on oatmeal

 - 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.
Ice melting in a cup is a change of state. So, it is a physical change. The solid ice becomes liquid, but it is still made of water.
The links between atoms in the water molecules do not change. So, a different type of matter is not formed.
Pouring milk on oatmeal is a physical change. The oatmeal and milk form a creamy mixture. But making this mixture does not form a different 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.
Ice melting is caused by heating. But pouring milk on oatmeal is not.
Both are caused by cooling.
Neither change is caused by cooling.