The layer of the earth where mantle convection occurs and on which the earth's crust rests is the

The asthenosphere is the highly viscous mechanically weak ductility-deforming region of the upper mantle of the Earth. It lies below the lithosphere, at depths between 100 and 200 km (~62 and 124 miles) below the surface, but perhaps extending as deep as 700 km (~435 miles).

The asthenosphere is a portion of the upper mantle just below the lithosphere that is involve in plate tectonic movements and isostatic adjustments. In spite of its heat, pressures keep it plastic.

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In the passage this question was provided for, you should have been able to locate the fallowing text: "the outer layer of the mantle; made up of plastic or semi-molten rock" and many others to imply this answer.

Asthenosphere

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms