If we separate Earth's layers based on mechanical properties, how many are there? What are they? How do their properties differ? ​

There would be 2 layers: lithosphere and asthenosphere

Explanation:

They contradict each other because the lithosphere consists of the crust as well as the portion of the upper mantle, which acts as a brittle, rigid solid. the asthenosphere is a partially molten upper mantle material that acts plastically and can flow.

The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow, like toothpaste. The lithosphere rests on the asthenosphere.

d) physical means can be used to separate the components of air.