In a gasoline engine, the area in the cylinder head where the air-and-fuel mixture is burned is called the combustion chamber (A).
Here's why:
1. The combustion chamber is the space within the cylinder head where the mixture of air and fuel is ignited by a spark plug.
2. Once ignited, the air-fuel mixture combusts, creating a rapid expansion of gases that pushes the piston down, generating power to drive the engine.
3. The combustion chamber is designed to promote efficient burning of the fuel mixture, ensuring proper engine performance and power output.
4. The piston (B) moves up and down within the cylinder, helping to compress the air-fuel mixture before ignition and converting the energy from combustion into mechanical motion.
Therefore, the correct answer is A. combustion chamber.