You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

[EX Q]: Question: Joseph began sanding the plank faster and faster, increasing the friction on the rubbing surface. As he does so, the heat energy 
 Option1: increases 
 Option2: decreases. 
 Explanation: Friction causes the molecules on rubbing surfaces to move faster, so they have more heat energy.
[EX A]: increases

[EX Q]: Question: If Mona is exploring and aquifer and she dives deeper down into it, what happens to the levels of fossil water she encounters? 
 Option1: they increase 
 Option2: they decrease 
 Explanation: Deeper aquifers typically contain older 'fossil water.'
[EX A]: they increase

[EX Q]: Question: If you tried to push a sack of unpopped popcorn or a sack of popped popcorn, both of the same volume, would it be easier to push the 
 Option1: sack of unpopped popcorn 
 Option2: sack of popped popcorn? 
 Explanation: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.
[EX A]:
sack of popped popcorn?