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 you are mixing paints if you add less water the colors will be 
 Option1: darker 
 Option2: lighter 
 Explanation: If the kidneys remove less water from the blood, the blood will look darker, because there is less water in it.

SOLUTION: darker

PROBLEM: Question: If Jim is an endotherm would his body give off _____ heat if the blood flow to the surface of his body were decreased? 
 Option1: more 
 Option2: less 
 Explanation: On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body.

SOLUTION: less

PROBLEM: Question: Reid has a very fit genotype. If he compares this genotype to a less fit one, his would be more likely to pass _____ copies of their alleles down. 
 Option1: more 
 Option2: less 
 Explanation: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

SOLUTION:
more