Earth's temperature is maintained at an average of 15°C because of .

Atmosphere CO2 and Ozone Layer.

Explanation: The CO2 will trap heat and keep the avg of 70F, then ozone layer shields heat radiation kicking it down to a 59F temp.

the water cycle, greenhouse gases, our atmosphere's thickness

Explanation:

a, c, d, e are all applying about success strategies.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.