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: Quent increases the energy of a liquid. He notices that the particles in the liquid 
 Answer: speed up
As the liquid particles lose energy, their movement slows down even more. As their movements become slower and slower, the attractive forces between become stronger.

Question: If a dog is extremely unfit and unhealthy breeders will want it to have 
 Answer: less offspring
Genotypes with greater fitness produce more offspring and pass more copies of their alleles to the next generation.

Question: When two things are not attracted to each other what are their energy levels? 
 Answer: low

Places where particles of a medium crowd closer together are called compressions, and places where the particles spread farther apart are called rarefactions. The more energy the wave has, the closer together the particles are in compressions and the farther apart they are in rarefactions.