Answer: Option D.
It releases energy.
Explanation:
Charcoal is a type of wood that burned or iginite under oxygen thereby producing carbondioxide, carbondioxide, water, methane, hydrogen e.t.c. when charcoal is burnt it releases energy. The energy is released because the total energy in water bonding is less than in the reactants.
2H2+O2 - 2H2O
