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 Cindy swam closer to the ocean surface, it got lighter and _____. 
 Option1: warmer 
 Option2: cooler 
 Explanation: Water density increases as salinity and pressure increase, or as temperature decreases.
[A]: warmer


[Q]: Question: Kevin has a hybrid car and Steve has a large truck. Which car likely pollutes less? 
 Option1: hybrid 
 Option2: truck 
 Explanation: Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.
[A]: hybrid


[Q]: Question: As planets get farther from the sun the sun's gravity on them becomes 
 Option1: stronger 
 Option2: weaker 
 Explanation: Even though the Sun is much larger than the Moon, the pull of the Suns gravity is much less because the Sun is much farther away.
[A]:
weaker