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.

Question: When we are increasing energy used while running what will happen? 
 Option1: speed up 
 Option2: slow down 
 Explanation: As the liquid particles lose energy, their movement slows down even more. As their movements become slower and slower, the attractive forces between become stronger.
speed up

Question: Dan hits a car with his car. Dan was going only twenty miles an hour, and the other car was stopped. If Dan had hit the car going forty miles an hour, the stopped car would be moved 
 Option1: more 
 Option2: less 
 Explanation: The harder the batter hits the ball, the greater will be its acceleration.
more

Question: When the ocean absorbs greenhouse gases what happens to it? 
 Option1: gains acidity 
 Option2: loses acidity 
 Explanation: An increase in greenhouse gases will increase the changes that are already being seen including in ocean acidity.

gains acidity