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: Katie is rubbing her hands on her leg. One hand rubs fast, the other hand rubs slow. The hand that will be cooler 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.

A: slower
****
Q: Question: Evan crawls through the toxic waste dump. His Geiger counter clicks very slowly. The levels of radiation are likely 
 Option1: high 
 Option2: low 
 Explanation: The faster the clicks of a Geiger counter occur, the higher the level of radiation.

A: low
****
Q: Question: Simon was digging in his yard and found that the rocks that were shallower in the ground, compared to the surface rocks, were likely 
 Option1: older 
 Option2: younger 
 Explanation: Therefore, deeper rock layers must be older than layers closer to the surface.

A:
younger
****