To answer this question, you need to understand the purpose and function of the device mentioned in the options.
Option A) Carburetor - This option is incorrect because a carburetor is a device that mixes air and fuel in an internal combustion engine, but it does not reduce gases produced by the engine.
Option B) Catalytic converter - This option is correct. A catalytic converter is a device fitted to motor vehicles to chemically reduce some gases produced by internal combustion engines like nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC) into less harmful products.
Option C) 2-stroke engines - This option is incorrect. 2-stroke engines refer to a type of internal combustion engine design, but they do not specifically address the reduction of harmful gases.
Option D) Tail pipe - This option is incorrect. The tailpipe is a part of the exhaust system that releases exhaust gases from the vehicle, but it does not actively reduce the harmful gases produced by the engine.
The correct answer is B) Catalytic converter. This option is correct because a catalytic converter is specifically designed to chemically reduce the gases produced by internal combustion engines into less harmful products.