Multiple choice

On which compositional layer does all life exist?

  1. crust

  2. mantle

  3. core

  4. atmosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The crust is the outermost solid shell of the Earth where all known life exists, as it provides the soil, water, and air interface needed for survival. The mantle and core are located deep within the Earth under extreme temperatures and pressures where life cannot survive. The atmosphere is a layer of gases, not a compositional layer of the solid Earth.

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