Has done what if it’s a question make it clear for us to answer
Separate Layer it's part of the "Atmosphere layers"
<span>Robinson projection will be used to examine and compare population densities, using one view of the entire world. This projection depicts the entire world in one view like a flat globe and the latitudes and longitudes as elliptical lines giving a easy way to examine that too accurately.</span>
The Answer is D Hope This Help
I am pretty sure it is C but correct me if I'm wrong hope this helps.