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: 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.
[A]: decreases

[Q]: Question: If Mona is adding chemicals to her swimming pool and she lowers the pH value of the water, what happens to the acidity of the water in the pool?
Option1: increase
Option2: decrease
Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
[A]: decrease

[Q]: Question: A satellite was sent to orbit and monitor a small planet but instead it ended up being pulled into the orbit of a nearby large planet. It was concluded that this happened because the gravitational pull of the larger planet was
Option1: stronger
Option2: weaker
Explanation: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.
[A]:
stronger