instruction:
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.
question:
Question: William sees that a country is shrinking rapidly. Will there be more or less availability of water in the future? 
 Answer: more
answer:
The availability of water is projected to get worse as demand increases.


question:
Question: Louis notices that Neptune is farther from the sun than Mercury. Which planet will take longer to rotate around the sun? 
 Answer: Neptune
answer:
The planets further from the Sun will have bigger orbits, and therefore take longer to revolve around the Sun.


question:
Question: Jeff should add _____ to his engine to decrease the friction in its processes. 
 Answer: gas
answer:

To reduce friction, oil is added to the engine.