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.

[Q]: Question: As Earth's climate becomes warmer it will develop _____ varieties of vegetation? 
 Option1: less 
 Option2: more 
 Explanation: The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering.
[A]: more


[Q]: Question: What will happen to the levels of pollution on Earth if the population increases? 
 Option1: they will rise 
 Option2: they will fall 
 Explanation: For example, more people on the Earth means more people contributing to global warming and pollution.
[A]: they will rise


[Q]: Question: The lighter someone's skin is the _____ melanin they have. 
 Option1: less 
 Option2: more 
 Explanation: However, the melanocytes of people with darker skin produce more melanin.
[A]:
less