Multiple choice

Which of the following is the slow process by which the dead plants buried deep under the earth become coal?

  1. Fermentation

  2. Distillisation

  3. Carbonisation

  4. Crystallisation

  5. None of the above

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

This is the correct option. Carbonisation is the slow process by which the dead plants buried deep under the earth have become coal.