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: When viewing the climate model John saw that the less gases were in the atmosphere, the heat would be 
 Option1: Larger 
 Option2: Smaller 
 Explanation: More greenhouse gases trap more heat and warm the atmosphere.
[A]: Smaller


[Q]: Question: If Mona is bouncing radar waves off a test car when training to be a policewoman and she notices the frequency of the waves returning to her radar gun is lower then it was before, what is happening to the car she is pointing the gun at? 
 Option1: decreasing in speed 
 Option2: increasing in speed 
 Explanation: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.
[A]: decreasing in speed


[Q]: Question: When Shane goes swimming in warmer water, he can move about slowly, whereas in cooler water, Shane's movement is 
 Option1: faster 
 Option2: slower 
 Explanation: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
[A]:
faster