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 you were to launch a cannon which ball would fly faster if everything else were the same? 
 Answer: Lighter
[EX A]: The mass of the particles: lighter particles will diffuse faster, because on average they move faster.

[EX Q]: Question: When we have a few blocks we can make 
 Answer: few arrangements
[EX A]: A: The more carbon atoms there are, the greater the number of possible arrangements of carbon atoms.

[EX Q]: Question: If we are able to recycle more things we have 
 Answer: less waste
[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.