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The fourth component of the fire tetrahedron is _________. 

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The fourth component of the fire tetrahedron is chemical chain reaction.

The fire triangle includes: Heat + Fuel + Oxygen. The fire tetrahedron adds a fourth element - Chemical chain reaction. The fourth component represents the self-sustaining nature of fire, where the chemical reactions produce enough energy to continue burning once started.

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Saniya Khatri

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