The stratosphere a. has higher levels of nitrogen and oxygen than the troposphere b. is where the asian brown cloud forms c. is where most weather occurs d. contains the atmosphere's protective ozone layer e. is characterized by temperatures that decrease with altitude

The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere.

The stratosphere is stratified in temperature, with warmer layers higher and cooler layers closer to the Earth; this increase of temperature with altitude is a result of the absorption of the Sun's ultraviolet radiation by the ozone layer.

This is in contrast to the troposphere, near the Earth's surface, where temperature decreases with altitude.

The border between the troposphere and stratosphere, the tropopause, marks where this temperature inversion begins. Near the equator, the stratosphere starts at as high as 20 km around 10 km at mid altitudes, and at about 7 km at the poles.

Stratospheric temperatures also vary within the stratosphere as the seasons change, reaching particularly low temperatures in the polar night. Winds in the stratosphere can far exceed those in the troposphere, reaching near 60 m/s in the Southern polar vortex.

So the correct answer for the above is

c. is where most weather occurs