Which of the following conditions characterizes atmosphere lll

I believe that this question has the following choices:

>  hydrogen- and helium-rich 
>  water vapor- and carbon dioxide-rich 
>  nitrogen- and oxygen-rich 
>  nitrogen-rich and oxygen-poor 

The correct answer among the choices is that atmosphere III is:

> nitrogen- and oxygen-rich 

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.