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.

Q: Question: Would a star that is significantly cooler than the sun, which is outputting blue light which is higher in frequency that the yellow light of the Sun, be 
 Option1: hotter 
 Option2: colder? 
 Explanation: Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.

A: colder?
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Q: Question: Will has two screws of the same length. One has 20 threads; the other has 200 threads. The screw with _____ threads likely needs less force to penetrate wood. 
 Option1: 20 
 Option2: 200 
 Explanation: Therefore, if the threads on a screw are closer together, you need to apply less force to penetrate the wood or other object.

A: 200
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Q: Question: If Jim assembles a large rock from many small pieces, what happens to the total surface area of the rocks? 
 Option1: it increases 
 Option2: it decreases 
 Explanation: As rock breaks into smaller pieces, the surface area of the pieces increases.

A:
it decreases
****