Plate tectonics suggests that the ( a. biosphere) floats and moves on the ( a. atmosphere)
or
plate tectonics suggests that the ( b. asthenosphere) floats and moves on the ( b. lithosphere)
or
plate tectonics suggests that the ( c. geosphere) floats and moves on the ( c. asthenosphere)
or
plate tectonics suggests that the ( d. lithosphere ) floats away and moves on the ( d. geosphere)
which one ?

The right alternative is "plate tectonics suggests that the (b. asthenosphere) floats and moves on the  (b. lithosphere  )"

Here is a quick explanation:

Plate Tectonics is a theory of geology that describes the large-scale movements that occur in the Earth's lithosphere.   In the theory of plate tectonics, the outermost part of the Earth is composed of two layers: the lithosphere, which includes the crust and the solidified zone in the outermost part of the mantle, and the asthenosphere, which includes the innermost and viscous part of the mantle On a time scale of millions of years, the mantle seems to behave like a superheated liquid, but in response to sudden forces, like the earthquakes, behaves like a rigid solid. The lithosphere is divided in several tectonic plates and these moving over the asthenosphere .

a change of venue is the legal term for moving a trial to a new location. a change of venue request because venue is improper means that the removing defendant believes that the case may not be in that venue because it is improper under procedural rules.

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts