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: By filling a kettle with water and placing it in a freezer turned to low, will the motion of the water molecules in the kettle 
 Option1: increase in speed 
 Option2: decrease in speed. 
 Explanation: The higher the temperature, the more energy the particles have and the faster they will move and diffuse.

SOLUTION: decrease in speed.

PROBLEM: Question: Terry sees a cold day outside. He is _____ likely to produce body heat on this day. 
 Option1: more 
 Option2: less 
 Explanation: For example, on a cold day, an endotherm may produce more body heat by increasing its rate of metabolism.

SOLUTION: more

PROBLEM: Question: A rocket would only be able to fly low if its mass were 
 Option1: higher 
 Option2: lower 
 Explanation: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.

SOLUTION:
higher