What type of air is in car tires

nitrogen

From the top: Air is 78 percent nitrogen and just under 21 percent oxygen, and the rest is water vapor, CO2, and small concentrations of noble gases such as neon and argon. We can ignore the other gases. There are several compelling reasons to use pure nitrogen in tires.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.