This question is only semi-random, it does relate to something said in the video. You must supply energy to start combustion reactions: you must drag a match across a rough surface to get it to light, the heat from a lit match or lighter is required to start charcoal burning, gas stoves often use an electric spark to ignite the methane (natural gas), etc. The fact that you must supply energy to get these reactions started is evidence of O activation energy O specific heat exoothermic reaction

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