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.

Question: If Milo is experimenting in his lab and he increases the temperature in the room, what happens to the energy of the particles in that room? 
 Option1: it increases 
 Option2: it decreases 
 Explanation: At higher temperatures, particles of reactants have more energy, so they move faster.
it increases

Question: If Mona is examining her arteries and she looks at ones that are farther away from her heart, what happens to the size of the arteries? 
 Option1: smaller 
 Option2: larger 
 Explanation: Further away from the heart, the aorta branches into smaller arteries, which eventually branch into capillaries.
smaller

Question: When someone gets older what happens to their heart 
 Option1: stronger 
 Option2: weaker 
 Explanation: The older a person is, the greater their chance of developing a cardiovascular disease.

weaker