Combustion/respiration is a biochemical process.

Explanation

**Step-by-Step Solution:**

1. **Define Combustion:**
- Combustion is a chemical process that involves the burning of substances in the presence of oxygen, resulting in the release of energy in the form of heat and light. It typically occurs at high temperatures.

2. **Characteristics of Combustion:**
- Combustion is an exothermic reaction, meaning it releases heat.
- The products of combustion are usually carbon dioxide (CO₂) and water (H₂O).
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