Question id 424 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

It Reduces The Density Of Air Entering The Carburettor, Thus Leaning The Fuel/air Mixture
The volume of air entering the carburettor, thus leaning the fuel/air mixture
The volume of air entering the carburettor, thus enriching the fuel/air mixture.
The density of air entering the carburettor, thus enriching the fuel/air mixture