Answer:
C)the presence of partial melting
Explanation:
The classification of the asthenosphere a mechanical one. This seeks to understand the forms of the different spheres.
The mechanical model of this entails:
Lithosphere ---------- Asthenosphere ----------------Outer core ----- inner core
The lithosphere is plastic and rigid but the asthenosphere is made up of weak and ductile earth materials.
You didn’t post any picture to show what you’re talking about
Cold,dry and artic air from the north.
<span>Since ages in a population pyramid are represented ranging from youngest at the bottom to oldest at the top, the two graphs aligned side by side typically give the appearance of a pyramid. This is because fewer people in a population live into old age. The BBC notes, however, that it is possible to distinguish different qualities in a population through variations from the standard pyramid shape. For example, an aging population with a low birth rate would look like an upside-down pyramid.</span>