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: David turns down the temperature in the cabin, so energy of sound waves is moving 
 Answer: slower
answer:
At a lower temperature, particles of the medium are moving more slowly, so it takes them longer to transfer the energy of the sound waves.


question:
Question: Eileen studied two identically sized populations of women, one in Springfield where the women were in their 50s and one in Mayfield where the women were in their 30s. The population with a lower incidence of breast cancer was 
 Answer: Mayfield group.
answer:
Breast cancer is rare in teens. It becomes more common as women get older.


question:
Question: Rich sees a blue star with his telescope. Tina sees a red star with his telescope. _____ sees the hotter star. 
 Answer: Rich
answer:

But, in stars, the bluer the star, the hotter it is, and the redder it is, the older and colder it is.