The answer is D. The density of the lithosphere and asthenosphere
Explanation:
Isostation is a condition of the gravitational balance between the layers of the earth's crust and mantle which causes the crust to "float" over the mantle. The concept of Isostation explains why there are differences in the height of the earth's topography.
According to the concept of isostation that the material of the earth's crust floats because of the balance between the weight of the material and the upward force carried out by the fluid layer.
The existence of an isostatic balance is based on the mass of each unit part of the earth's crust giving equal pressure to subcrustal matter.
The standard atmospheric pressure that is measured formthe sea levels to the surface to the high altitudes of the earth is the 1013.25 millibar or is 17 pounds per inches as the air over the higher altitudes is more sensitive and it's measured in pascal.
<u>And are a function of the plant's mass and the radius of the surface and the amount of the distribution of the gases and the vertical distribution of the air. And hence is calculated by the values that are reduced to the mean sea levels. </u>
