B it is a type of grass is false
It is used to display the orientation of the cardinal directions. And their intermediate points.
clear explanation and good explanation
The answer is Pennsylvanian. I worked on this before. The Pennsylvanian era is a subperiod of the Carboniferous Period. i really hope this helps :)
Venus: almost no surface winds, sulfuric acid clouds, runaway greenhouse effect.
Earth: atmosphere composed primarily of nitrogen and ultraviolet-absorbing stratosphere
Mars: extremely low-density atmosphere, global dust storms.
