List conditions under which combustion can take place.

Explanation

To answer the question about the conditions under which combustion can take place, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Combustion**:
- Combustion is a chemical process or reaction where a fuel reacts with oxygen, producing heat and light energy.

2. **Identifying Conditions for Combustion**:
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