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.

[EX Q]: Question: If Mona owns a car and she decides to switch to a cleaner burning fuel, will she create more or less pollution?
Answer: less pollution
[EX A]: The advantage to biofuels is that they burn more cleanly than fossil fuels. As a result, they create less pollution and less carbon dioxide.

[EX Q]: Question: Terry's system wastes 50% of its energy, while Rick's system wastes 75%. The less efficient system is
Answer: Rick's
[EX A]: The greater the wasted output energy, the less efficient the system.

[EX Q]: Question: Mona is an astronomer who looks at stars for a living. If she is observing how hot certain stars are and she notices that one is hotter then the others, what does that say about the brightness of that star?
Answer: it's brighter
[EX A]:
The hotter a main sequence star is, the brighter it is.