<span>The asthenosphere is a part of the upper mantle just below
the </span>lithosphere<span> <span>that is involved in </span></span>plate tectonic
movement<span> <span>and </span></span>isostatic<span> <span>adjustments. The
lithosphere-asthenosphere boundary is conventionally taken at the 1300 °C </span></span>isotherm<span>, above which the mantle behaves in a rigid fashion and below
which it behaves in a </span>ductile<span> fashion. a</span><span>nd </span>flows very slowly, in a manner<span> similar
to the ice at a bottom of a glacier.</span>
The gear ratios would look like A:B=1:9 and C:D=1:32 if you are just needing the gear teeth ratio. Not a lot of information to go off of from the question though
Answer:
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Explanation:
