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: As Earth's climate becomes cooler it will develop _____ varieties of vegetation? 
 Option1: less 
 Option2: more 
 Explanation: The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering.
answer:
less


question:
Question: A hydrocarbon that halves its carbon atoms will cause an _____ in the amount of isomers. 
 Option1: decrease 
 Option2: increase 
 Explanation: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
answer:
decrease


question:
Question: What will happen to Jim's muscle strength if he exercises more then he has in the past? 
 Option1: his muscles will become stronger 
 Option2: his muscles will become weaker 
 Explanation: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.
answer:

his muscles will become stronger