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.

[EX Q]: Question: Kate makes a machine that is very unproductive, and it gets work done slowly, because it uses force in amounts that are 
 Option1: lesser 
 Option2: greater 
 Explanation: Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.
[EX A]: lesser

[EX Q]: Question: If you found something with very few hydrogen ions it would be 
 Option1: basic 
 Option2: acidic 
 Explanation: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.
[EX A]: basic

[EX Q]: Question: When we get to the bottom of a mountain the air is 
 Option1: more dense 
 Option2: less dense 
 Explanation: At higher elevations, there is less air to press on a given area.
[EX A]:
more dense