Oxygen, as Oxidation is the very definition of "burning".
Yes, anything that burns (combust) is a chemical change
A fire burns.
Something that burns or is flammable would be a chemical change.
The chemical that causes pink burns on the skin is hydrofluoric acid.
There is Chemical, heat, and electrical burns.
Chemical
Sources that can result in burns include hot surfaces, flames or fire, hot liquids, steam, and chemicals. These sources can cause thermal burns, scald burns, or chemical burns depending on the nature of the source and exposure.
Chemical change
yes 3rd degree chemical burns
Chemical change
Chemical burns may be prevented by wearing protective clothing, including gloves and eyeshields.
A chemical splash can harm you by causing skin irritation, burns, or even chemical burns depending on the type of chemical involved. If the chemical gets into your eyes, it can cause irritation, burns, or damage to your vision. Inhaling chemical fumes from a splash can also cause respiratory issues or poisoning.