How does a campfire involve energy? Is it endothermic or exothermic? What would be the system and what would be the surroundings?

Campfire is an exothermic or energy releasing reaction.

The system comprises the elements of the fire while the surrounding comprises those items absorbing the produced heat.

Explanation:

Campfire involves the exothermic energy releasing process of burning an appreciable amount of wood in the presence of excess oxygen to produce heat, light, carbon dioxide, carbon monoxide, smoke and ash.

In the process of fire burning as a camp fire,

The system comprises of the following;

Wood + Oxygen + Ignition source → CO₂ + Ash + Smoke

The surrounding is the environment around the campfire at a lower temperature such as those sitting around the campfire

3 hours because it is a decent distance.