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: Tommy traded in his four-cylinder Pinto for an eight-cylinder Mustang. The Pinto engine was 
 Option1: more powerful 
 Option2: less powerful. 
 Explanation: The more cylinders a car engine has, the more powerful its engine can be.

A: less powerful.
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Q: Question: Leo is working in a lab studying genotypes. He notices that the genotypes that are more fit produce 
 Option1: less offspring. 
 Option2: more offspring 
 Explanation: Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

A: more offspring
****
Q: Question: A non-smoker's body works _____ just to get needed air. 
 Option1: less 
 Option2: more 
 Explanation: When a person smokes there are chemicals released by the tobacco that enter the lungs. Because the lungs have to work harder to remove the chemicals, the body has to work harder to get the air needed to survive.

A:
less
****