The thing that makes a thing living is that they are made of cells, use and obtain energy, grow and develop, and living things respond to their enviroment.
Hemoglobin causes the substance to form long rods in the red blood cell as the hemoglobin releases oxygen
Answer:
pressure gradient
Explanation:
The correct answer would be pressure gradient.
<em>A pressure gradient is created when there is a difference in the amount of pressure between two points or locations that are adjacent to one another.</em>
In this case, the two locations that are adjacent to one another are the inside and outside of the lung. When one breathes in, the pressure inside the lung is more than that of the outside and the lung expands as a result. When we breathe out, the pressure outside is more than that of the inside and the lung collapses.
C because I had the same question and my teacher said it was c
