Chemical energy: The energy that coal possesses is chemical bonding between hydrogen and carbon atoms. This energy is chemical energy. From the molecular point of view, chemical energy is potential energy because the electron positions are changed when a chemical reaction takes place. Work is obtained by breaking the chemical bonds. When either coal, oil, gas, or wood is burned, a chemical reaction takes place, and chemical energy is released.
Therefore, the answer is energy in an apple that a worm eats