Geographically, a shield and a surrounding platform together are .

a. a low-lying region where Precambrian rocks crop out
b. a low-lying region where Precambrian rocks are covered by Phanerozoic sedimentary strata
c. a region of compressed rock located behind a volcanic arc at a convergent continental margin
d. synonymous with craton

The correct answer is D. Synonymous with craton

Explanation:

Craton is referred to as a large immobile block of earth crust composed of ancient crystalline basement rock and have deep lithosphere roots that extends deeply into the earth's mantle.

Cratons are often seen as shields because the basement rock crops out at the surface, and in platforms, the basement is overlaid by sedimentary rock.

Geographically, a shield and a surrounding platform together are synonymous with craton.

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