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: Planets moving apart means there will be _____ gravitational force between them. 
 Answer: less
[A]: The further objects are away from each other, the smaller the gravitational force.


[Q]: Question: Dean wants his solution to be as acidic as possible, so his concentration of hydrogen ions will be 
 Answer: higher
[A]: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.


[Q]: Question: Dave is looking at stars in the sky, and he sees that while most are redder, that there is a large blue one. Dan knows that the blue star, compared to the red ones, is 
 Answer: hotter
[A]:
But, in stars, the bluer the star, the hotter it is, and the redder it is, the older and colder it is.