instruction:
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
question:
Question: If a device were to become less efficient, it would produce _____ usable energy. 
 Answer: less
answer:
The more efficient a device is, the greater the percentage of usable energy it produces.


question:
Question: If an animal is able to eat food more difficult is it more or less likely to reproduce? 
 Answer: less
answer:
Natural selection is the process by which living things with beneficial traits produce more offspring, so their traits become more common over time.


question:
Question: Woody is diving at a depth of 100 feet while Gertrude is diving at a depth of 10 feet. Who is more likely to encounter 'fossil water'? 
 Answer: Woody
answer:

Deeper aquifers typically contain older 'fossil water.'