Final answer:
Burning wood in a campfire is an exothermic process as it involves releasing heat energy into the surroundings.
Step-by-step explanation:
Among the processes listed, burning wood in a campfire is exothermic. An exothermic process is one that releases heat. When wood burns in a campfire, chemical energy stored in the wood is converted into heat and light energy, thus releasing heat into the surroundings.
To clarify with other examples: Water boiling is generally considered an endothermic process because it requires heat to convert water from a liquid to a gas. Gasoline burning is an exothermic process as it releases heat. Ice forming on a pond is also exothermic because as the water freezes, it releases heat to the surrounding environment. Photosynthesis is an endothermic process because it requires energy input, specifically from sunlight, to convert carbon dioxide and water into glucose and oxygen.