What do these two changes have in common?
water evaporating from a lake
cooking a pancake

 - Both are caused by cooling.
 - Both are caused by heating.
 - Both are only physical changes.
 - Both are chemical changes.
Step 1: Think about each change.
Water evaporating from a lake is a change of state. So, it is a physical change. The liquid changes into a gas, but a different type of matter is not formed.
Cooking a pancake is a chemical change. Pancakes are made from pancake batter. A cooked pancake is a different type of matter than pancake batter. Pancake batter is wet and slippery. Cooked pancakes are fluffy and can be good to eat!
Step 2: Look at each answer choice.
Both are only physical changes.
Water evaporating is a physical change. But cooking a pancake is not.
Both are chemical changes.
Cooking a pancake is a chemical change. But water evaporating from a lake is not.
Both are caused by heating.
Both changes are caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.