What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure?

As air pressure in an area increases, the density of the gas particles in that area decreases.

As air pressure in an area increases, the density of the gas particles in that area increases.

As air pressure in an area increases, the density of the gas particles in that area remains constant.

As air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern.