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: If Jim is screwing in two bolts and the first one has threads that are close together while the second one has threads that are far apart, which one must he apply less force to? 
 Option1: first bolt 
 Option2: second bolt 
 Explanation: The trade-off when the threads are closer together, is that more turns of the screw or bolt are needed to do the job because the distance over which the input force must be applied is greater.

Answer: second bolt


Question: Question: When you go into a cave, the rocks at shallower levels are _____ than the rocks on the surface. 
 Option1: younger 
 Option2: older 
 Explanation: The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.

Answer: younger


Question: Question: When you look at a pool if it's deeper it has 
 Option1: more water 
 Option2: less water 
 Explanation: Deeper aquifers typically contain older 'fossil water.'

Answer:
more water