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: If Mona is digging and she uncovers more rock, what happens to the total area that chemical weathering can occur? 
 Option1: increase 
 Option2: decrease 
 Explanation: With more surfaces of the rocks exposed, there are more places for chemical weathering to occur.

SOLUTION: increase

PROBLEM: Question: If Jim moves his telescope from a mountaintop to Death Valley, a location with much air above it, what will happen to the amount of interference from the atmosphere? 
 Option1: increase 
 Option2: decrease 
 Explanation: Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.

SOLUTION: increase

PROBLEM: Question: When we have a lot of greenhouse gases in the air what happens to the temperature? 
 Option1: increases 
 Option2: stays the same 
 Explanation: As greenhouse gases increase, changes will be more extreme.

SOLUTION:
increases