Two things required are water(H2O), carbon dioxide (CO2), and chlorophyll
These are called igneous rocks due to them being made from lava from an volcanoe eruption,
Its "C" because the earth only has a certain amount of oil but yet we have endless amount of sun, solar, and wind
Answer:
Birds have remarkably specialized bones that are pneumatic, because they are full of air sacs that provide a continuous flow of breath throughout their bodies. In short, their lungs are essentially hooked up to their bones.
