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: Eric hears a sound from far away. If this is the first sound he heard, this sound is likely 
 Answer: strong
The farther the sound waves travel away from the source, the more spread out their energy becomes.

Question: If Mona shines a light through both wool and cotton and determines that cotton is more dense then wool, which material will the light move faster through? 
 Answer: wool
The more dense the medium, the slower the light moves.

Question: Ollie was running for 20 minutes while Jim was standing for 20 minutes. Which person likely has temporarily engorged blood vessels? 
 Answer: Ollie

Increasing the diameter of the blood vessels increases the amount of blood and heat that moves near the skins surface.