Answer:
The upper mantle and crust.
yes most jobs are primary, secondart, tertiary, and quaternary
B. Both continental and ocean-floor topography are measured relative to sea level
Explanation:
On a topographic map, both continental and ocean-floor topography are measured relative to sea level.
The sea level is the reference surface for the continental and ocean floor topography.
- A topographic map is a map that shows landform using series of contour lines.
- The lines joins places of equal elevation.
- The elevation is usually referenced to the sea level surface.
- The sea level is taken as the surface with 0 depth or height.
- Continental topography is all places above the sea level.
- Ocean floor is below the sea level surface
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Many rural, and country areas. That is why cities like New York City, Dubai, Shanghai have a high population density. They are cities not rural and country area. Hope this helps!
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