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: Rich is 60 years old and Tony is 30 years old. _____ has a greater risk of developing cardiovascular disease. 
 Answer: Rich
[A]: Older age, male gender, and a family history of cardiovascular disease all increase the risk of developing cardiovascular diseases and cant be controlled.


[Q]: Question: Would a diesel powered submarine release less pollution if it were running on 
 Answer: its battery backup power?
[A]:
Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.