In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: The sum of the kinetic and potential energies of a system’s atoms and molecules is called what? Answer: internal energy
The sum of the kinetic and potential energies of a system’s atoms and molecules is called internal energy.

Question: Which side of the heart does blood from the lungs enter into? Answer: left atrium
Blood from the lungs enters into the left atrium.

Question: Which zone is located below 200 meters from the surface? Answer: aphotic zone

Aphotic zone zone is located below 200 meters from the surface.