Igneous. Igneous forms when lava cools off. :)
Oxygen and carbon dioxide travels to and from tiny air sacs in the lungs, through the walls of the capillaries, into the blood. Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.
So they can breatheso they can breatheso they can breathe<span>so they can breathe
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Answer:
B the plants
Explanation:
The first level on a food pyramid has the most stored energy
