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: Rich breathed out. When he breathes _____ his chest seems larger. 
 Option1: in 
 Option2: out 
 Explanation: Inhaling, or breathing in, increases the size of the chest, which decreases air pressure inside the lungs.

A: out
****
Q: Question: If Mona is freezing a glass of water and the temperature of the water begins to decrease, what happens to the density of that water? 
 Option1: increases 
 Option2: decreases 
 Explanation: Lower temperature and higher salinity yield the densest water.

A: increases
****
Q: Question: The government of Canada is considering implementing more carbon taxes across the country. If these taxes were implemented, the amount of carbon dioxide emissions in the country would be expected to 
 Option1: fall 
 Option2: rise 
 Explanation: The carbon taxes encourage people to use less fossil fuel, which reduces carbon dioxide emissions.

A:
fall
****