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: Katie is rubbing her hands on her leg. One hand rubs fast, the other hand rubs slow. The hand that will be warmer in the end is the one that moves 
 Option1: faster 
 Option2: slower 
 Explanation: Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.

Answer: faster


Question: Question: For radio transmissions, longer wavelength waves have 
 Option1: higher or 
 Option2: lower frequencies. 
 Explanation: Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.

Answer: lower frequencies.


Question: Question: If Jim's country increases the amount of greenhouse gases that it emits, the acidity of the ocean's on the planet will 
 Option1: increase 
 Option2: decrease 
 Explanation: An increase in greenhouse gases will increase the changes that are already being seen including in ocean acidity.

Answer:
increase