A campfire is a good source of heat and light on a cool night. The energy that is released when firewood is burned comes from the energy used to carry the wood. the chemical bonds in the wood. the kinetic energy of the moving flames. the energy used to strike the match.?
chemical reactions in the material used to make matches, and the cardboard... so hope this helps :)
NOTE: im not to good at this stuff so i rlllllly hope it helps