instruction:
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:
Question: Will's spaceship flew further and further from the sun. The temperature _____ over time. 
 Option1: increased 
 Option2: dropped 
 Explanation: The stratosphere gets most of its heat from the Sun. Therefore, its warmer closer to the Sun.
answer:
dropped


question:
Question: Ease of mobility _____ when the animal is decreased in size. 
 Option1: increase 
 Option2: decrease 
 Explanation: The larger the animal, the heavier the exoskeleton, making movement more difficult.
answer:
increase


question:
Question: If Jim lowers the temperature of water in his bathtub, what happens to the density of the water? 
 Option1: decreases 
 Option2: increases 
 Explanation: Water becomes more dense when it is colder and when it has more salt.
answer:

increases