Define combustion. What are the essential conditions required for combustion to occur?

Explanation

### Step-by-Step Text Solution:

**Step 1: Define Combustion**
Combustion is a chemical process in which a substance reacts with oxygen, resulting in the release of heat and light. This process is commonly known as burning. For example, when coal (which is primarily carbon) burns in the presence of oxygen, it undergoes combustion.

**Step 2: Identify the Essential Conditions for Combustion**
There are three essential conditions required for combustion to occur:

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