Final answer:
The sequenced first stage in scar formation caused by a burn is inflammation, followed by proliferation, epithelialization, and remodeling.
Step-by-step explanation:
The sequenced first stage in scar formation caused by a burn is inflammation. After the initial burn, the body responds with the classic inflammatory response, which involves redness, swelling, and pain. This response is followed by the subsequent stages of proliferation, epithelialization, and remodeling.