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: What happens to water when it absorbs salt? 
 Option1: lower density 
 Option2: Higher Density 
 Explanation: Water becomes more dense when it is colder and when it has more salt.

SOLUTION: Higher Density

PROBLEM: Question: If we find something with a low pH value that is likely to be 
 Option1: acidic 
 Option2: basic 
 Explanation: The higher the pH value is, the stronger the base.

SOLUTION: acidic

PROBLEM: Question: If Milo is out exploring and he comes across two glaciers, each with their own u-shaped valley, will the smaller or larger glacier have a smaller u-shaped valley? 
 Option1: larger glacier 
 Option2: smaller glacier 
 Explanation: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.

SOLUTION:
smaller glacier