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: When there are fewer people in an area the amount of water will 
 Answer: increase
The availability of water is projected to get worse as demand increases.

Question: Dell added lots of silica to her magma project. The magma will be _____ in color. 
 Answer: lighter
Magmas that produce lighter colored minerals are higher in silica.

Question: If Milo is listening to the radio and he moves closer to the radio in the room, what happens to the sound waves entering his ear? 
 Answer: they spread out less

The farther the sound waves travel away from the source, the more spread out their energy becomes.