Question

select the correct answer.
what causes an aurora?
a. an aurora is the consequence of solar wind entering the earth and cutting through the earths magnetosphere.
b. an aurora is the consequence of combustion of gases taking place at the poles of the earth.
c. an aurora is the consequence of solar prominences entering the earth.
d. an aurora is the consequence of sunspots entering the earth.

Explanation:

Auroras are caused by solar wind (charged particles from the Sun) interacting with the Earth's magnetosphere. Solar prominences are large, bright features extending outward from the Sun's surface but are not the direct cause of auroras. Combustion of gases at the Earth's poles is not relevant to aurora formation. Sunspots are areas on the Sun with strong magnetic fields and are not the cause of auroras.

Answer:

A. An aurora is the consequence of solar wind entering the Earth and cutting through the Earth's magnetosphere.