Most atmospheric aerosols
a)originate at Earth's surface.
b)are products of photosynthesis.
c)consist of meteorites.
d)occur in the stratosphere.
all of the above are correct
Most aerosols occur in the lower atmosphere, near their sources on Earth's surface; they derive from wind erosion of soil, ocean spray, forest fires, volcanic eruptions, and industrial and agricultural activities. Also, some aerosols, such as meteoric dust, enter the atmosphere from above.