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.

[Q]: Question: Carbon dioxide levels increasing cause the temperature to 
 Answer: increase
[A]: An increase in greenhouse gases leads to greater greenhouse effect.


[Q]: Question: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper. 
 Answer: more
[A]: Rougher surfaces have more friction between them than smoother surfaces.


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