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.
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Question: Question: When we look at animals when their population gets bigger what happens to each animal? 
 Option1: grow bigger 
 Option2: shrink 
 Explanation: In exponential growth as the population size increases, the growth rate also increases.

Answer: grow bigger


Question: Question: When viewing the climate model John saw that the less gases were in the atmosphere, the heat would be 
 Option1: Larger 
 Option2: Smaller 
 Explanation: More greenhouse gases trap more heat and warm the atmosphere.

Answer: Smaller


Question: Question: If Jim works hard and decreases the strength of his muscles, his endurance becomes 
 Option1: greater 
 Option2: smaller 
 Explanation: Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance.

Answer:
smaller