D. Mental Map
because: a mental map is how you perceive your area
The arrangement of the layers of the atmosphere from the ground to the outer regions above the ground is troposphere, stratosphere, mesosphere, thermosphere, ionosphere and exosphere. The UV is said to be absorbed by layers thermosphere, mesosphere and stratosphere. Answer is B.
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<span>Stage 4 demographic means that the population is stabilized by a low rate of births and deaths. Out of the 4 options it would be most likely that western Europe's population would stabilize this way since it is one of the oldest and advanced, so rapid growth would be low and death rates reduced by advances in medicine.</span>
