<u>Respiration</u>is not considered to be an animal behavior.
<h3>What is Respiration?</h3>
The respiratory system, also known as the respiration or ventilatory system, is a biological system in both plants and animals that consists of a variety of organs and structures that are employed for gas exchange.
Depending on the organism's size, environment, and evolutionary background, the anatomy and physiology that cause respiration vary widely.
In land animals, the respiratory surface is internalized as the lining of the lungs.
Gas exchange in the lungs takes place in millions of tiny air sacs, known as alveoli in mammals and reptiles and atria in birds.
The air is in close touch with the blood in these tiny air sacs because they have an abundant blood supply.
To learn more about respiration from the given link
The six most common elements found in life on Earth are carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur, and they compose 97 percent of a human's body mass
