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.

[EX Q]: Question: Ease of mobility _____ when the animal is decreased in size. 
 Option1: increase 
 Option2: decrease 
 Explanation: The larger the animal, the heavier the exoskeleton, making movement more difficult.
[EX A]: increase

[EX Q]: Question: A hydrocarbon that halves its carbon atoms will cause an _____ in the amount of isomers. 
 Option1: decrease 
 Option2: increase 
 Explanation: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
[EX A]: decrease

[EX Q]: Question: The more energy particles in matter have, they move 
 Option1: slower 
 Option2: faster. 
 Explanation: The particles in matter are always moving. The more energy they have, the faster they move.
[EX A]:
faster.