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: If Mona is a sculptor and she is making two clay vases, what happens if she increases the mass of the vases by adding clay to them? 
 Option1: gravitational force of attraction is stronger 
 Option2: gravitational force of attraction is weaker 
 Explanation: The greater the mass of the objects, the stronger the gravitational force of attraction between them.
gravitational force of attraction is stronger

Question: Terry cuts the trees down in the forest. The air is now _____ dry. 
 Option1: more 
 Option2: less 
 Explanation: With fewer trees, the air is drier and droughts are more common.
more

Question: Mike wants his voice to travel slowly, so he will speak in a room that is 
 Option1: colder 
 Option2: warmer 
 Explanation: For a given medium such as air, sound has a slower speed at lower temperatures.

colder