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: John was watching objects fall from the sky in the simulator. He observed that items with more mass will be pulled by gravity at a rate that is 
 Option1: Stronger 
 Option2: Weaker 
 Explanation: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.

SOLUTION: Stronger

PROBLEM: Question: As goats are removed from an area with grass what will happen to the grass levels? 
 Option1: increase 
 Option2: decrease 
 Explanation: In an inverse relationship, when one variable increases, the other variable decreases.

SOLUTION: increase

PROBLEM: Question: If Milo's bike chain is not moving well and he adds some oil to it, what will happen to the levels of friction the chain experiences? 
 Option1: increase 
 Option2: decrease 
 Explanation: To reduce friction, oil is added to the engine.

SOLUTION:
decrease