${CO}_{2}$ extinguishers help extinguish fires by.

reducing the heat

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cutting the supply of oxygen.

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limiting the supply of fuel.

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Solution

The correct option is B cutting the supply of oxygen.
Carbon dioxide is a non-conductive and non-corrosive gas used to reduce the amount of oxygen available to the fire. It is heavier than air, hence when $C O_{2}$ extinguishers are used $C O_{2}$ replaces the air from the surface of fire and thus cuts the supply of oxygen. In this way, it helps in extinguishing the fire.

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$C O_{2}$ extinguishers help extinguish fires by

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