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: James stares at the volcano and saw the rocks melt because of the _____ temperatures. 
 Option1: high 
 Option2: low 
 Explanation: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.

A: high
****
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: If Mona is pushing some toy cars around and she knows that the mass of the truck is less then the mass of the car, which one will accelerate faster when she pushes it? 
 Option1: truck 
 Option2: car 
 Explanation: The greater the mass of an object, the less it will accelerate when a given force is applied.

A:
truck
****