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: When Shane goes swimming in warmer water, he can move about slowly, whereas in cooler water, Shane's movement is
Option1: faster
Option2: slower
Explanation: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.

SOLUTION: faster

PROBLEM: Question: As water boils in a kitchen it evaporates
Option1: less
Option2: more
Explanation: The higher the temperature of the liquid, the faster it will evaporate.

SOLUTION: more

PROBLEM: Question: Eric measures 20 hydrogen ions per 100ml in one solution. Another solution has 30 hydrogen ions per 100ml. The solution with more hydrogen ions is _____ acidic.
Option1: more
Option2: less
Explanation: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.

SOLUTION:
more