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.
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Question: Question: If Mona is studying the galaxy and she notices that the universe is expanding less then it used to, what does that mean is happening to the galaxies in the universe? 
 Answer: moving closer together

Answer: As the Universe expands, galaxies move further and further apart.


Question: Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The light cart, compared to the heavy one, will accelerate 
 Answer: quickly

Answer: The greater the mass of an object, the less it will accelerate when a given force is applied.


Question: 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

Answer:
The advantage to biofuels is that they burn more cleanly than fossil fuels. As a result, they create less pollution and less carbon dioxide.