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.

Question: If Milo's engine is running hot, how will adding oil affect friction? 
 Option1: increase 
 Option2: reduce 
 Explanation: To reduce friction, oil is added to the engine.
reduce

Question: A puppy, compared to a elephant, is a smaller size, and therefore the weight of the puppy, compared to the elephant, is 
 Option1: greater 
 Option2: lesser 
 Explanation: The larger the animal, the heavier the exoskeleton, making movement more difficult.
lesser

Question: Sarah ate a salad for dinner, Sarah's levels of toxic metals have 
 Option1: decreased. 
 Option2: increased or 
 Explanation: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.

decreased.