Question

The density of air
a. reduces with altitude
b. increases with altitude
c. remains fixed with altitude
d. none of these​

Answer 1

Answer:

The density of air, ρ (Greek: rho) (air density), is the mass per unit volume of Earth's atmosphere, and is a useful value in aeronautics. As does air pressure, air density decreases with increasing altitude and temperature

Explanation:

may it's helpful for you

Answer 2

Answer:

a. reduces with altitude...

Explanation:

Because at high altitude there is less air pushing down from above...