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: As the train approached the intersection and blew its horn, expanding the wavelengths of the sound, did the frequency of the horn 
 Option1: increase 
 Option2: decrease? 
 Explanation: This means that as wavelengths get shorter, more waves move past a particular spot in the same amount of time.

A: decrease?
****
Q: Question: If John heats a gas in his bunsen burner, what would happen to the gas particles? 
 Option1: they would move faster 
 Option2: they would move slower 
 Explanation: If the gas is heated, the particles will move faster as they gain more energy.

A: they would move faster
****
Q: Question: When everyone can eat what happens to the number of people that die? 
 Option1: increases 
 Option2: decreases 
 Explanation: With better food and less chance of disease, the death rate fell.

A:
decreases
****