An aurora is produced when
a. solar wind particles are directed toward the magnetic poles and excite atmospheric gases.
b. swamp gases rise from the arctic tundra and react with the upper atmosphere.
c. radiation in the Van Allen belts can be seen on a clear, cold night.
d. lightning travels from cloud to cloud rather than cloud to ground

Option A                         

Explanation:

An aurora, also alluded to as oceanic lighting, southern lights, or northern lights, is a show of visible illumination in Earth's atmosphere, primarily seen in higher latitudes areas. Auroras are also the product of solar wind perturbations in the magnetic field.

Auroras can be termed as the product of solar wind perturbations in the magnetosphere. Such disruptions are also intense enough through both solar wind and magnetospheric plasma to change the trajectories of charged particles. Such ions precipitate through the upper atmosphere, primarily electrons and protons