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: Two batteries are sitting on a table, one has energy being passed quickly around, the other has energy passed slowly around. The battery with energy being passed quickly has particles of matter that are 
 Option1: further apart 
 Option2: closer together 
 Explanation: When particles of matter are closer together, they can more quickly pass the energy of vibrations to nearby particles.

Answer: closer together


Question: Question: Robby noticed a weak electrostatic force between two charged objects. He wanted to decrease the strength of this force. So how should he position them? 
 Option1: Closer together 
 Option2: Farther apart 
 Explanation: The closer the charged objects are, the stronger the electrostatic force.

Answer: Farther apart


Question: Question: In the past, solar power was _____ than it is today. 
 Option1: more expensive 
 Option2: less expensive 
 Explanation: Solar power is expensive, but as demand increases technology improves and costs decrease.

Answer:
more expensive