Multiple choice

An organic rock.

  1. Igneous rock

  2. Basalt

  3. Inselberg

  4. coal

  5. Molten core

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coal is classified as an organic sedimentary rock formed from the remains of ancient plants that were buried and compressed over millions of years. Unlike igneous rocks (formed from cooling magma) or metamorphic rocks, coal contains organic carbon and originates from biological sources. It is the only organic rock among the options.

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