Which of the following reactions of `Al` is known as the thermite reaction?

Explanation

To determine which reaction of aluminum is known as the thermite reaction, we can follow these steps:

### Step 1: Understand the Thermite Reaction
The thermite reaction is a type of reaction where aluminum reacts with a metal oxide, typically iron(III) oxide (Fe2O3), to produce aluminum oxide (Al2O3) and molten iron (Fe). This reaction is highly exothermic, meaning it releases a large amount of heat.

### Step 2: Write the Reaction
The balanced chemical equation for the thermite reaction is:
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