Question

What causes the asthenosphere to flow?

GPT 3.5
The asthenosphere flows due to its high temperature and the presence of small amounts of molten rock or magma within it. This high temperature reduces the strength and rigidity of the rocks in the asthenosphere, making them more ductile and capable of flowing over long periods of time under the influence of stress from the Earth's mantle. This flow is also aided by the intense pressure from the overlying lithosphere.