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: If Mona lowers the temperature on the solution she is creating, what happens to the speed of particles in that solution? 
 Option1: increases 
 Option2: decreases 
 Explanation: At a lower temperature, particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves.

SOLUTION: decreases

PROBLEM: Question: There are many more people on the Earth today than there were hundreds of years ago. Because of this, there is 
 Option1: more water 
 Option2: less water. 
 Explanation: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.

SOLUTION: less water.

PROBLEM: Question: If the speed of a stream increases, the size of the particles carried in that stream 
 Option1: increase 
 Option2: decrease 
 Explanation: In erosion, a slower moving stream will only carry smaller particles.

SOLUTION:
increase