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: If Mona is measuring atoms and she finds out that one atom is smaller then another, what does that imply about the distance of electrons from the nucleus of that atom? 
 Option1: closer together 
 Option2: farther away 
 Explanation: In bigger atoms, valence electrons are farther from the nucleus.

A: closer together
****
Q: Question: John was weighing some materials in his science lab. He observed that as objects had greater density, the heaviness of the objects 
 Option1: Increased 
 Option2: Decreased 
 Explanation: A given volume of a denser substance is heavier than the same volume of a less dense substance.

A: Increased
****
Q: Question: Micah sees that there are many new changes going on to the ocean acidity, and can know that the greenhouse gases have 
 Option1: increased 
 Option2: decreased 
 Explanation: An increase in greenhouse gases will increase the changes that are already being seen including in ocean acidity.

A:
increased
****