TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: faster

PROBLEM: Question: As the injection was given and the blood vessels expanded, Dean's blood moved through 
 Option1: in smaller amounts 
 Option2: in greater amounts 
 Explanation: Increasing the diameter of the blood vessels increases the amount of blood and heat that moves near the skins surface.

SOLUTION: in greater amounts

PROBLEM: Question: Two small planets are near each other, and two large planets are near each other. The smaller planets, compared to the larger planets will have a gravitational pull that is 
 Option1: weaker 
 Option2: stronger 
 Explanation: The greater the mass of the objects, the stronger the gravitational pull between them.

SOLUTION:
weaker