Which layer of earth is the densest and why is that so? a. the outer core is densest due to gravitational compression. b. the outer core is densest due to generation of radiogenic heat. c. the outer core is densest due to accretion. d. the inner core is densest due to gravitational compression. e. the inner core is densest due to generation of radiogenic heat.

There are following layers on earth

crust

mantle

core

the core is innermost layer of earth

crust is outermost layer of earth

mantle is in between crust and core

Out of these three the inner core is densest

As we move towards interior of earth the density increases due to increase in  pressure

The density is further enhanced by presence of heavier materials like iron

So the correct answer is

The inner core is densest due to gravitational compression.

D. The inner core is densest due to gravitational compression.

Explanation:

i took the quiz

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: