Which components are primary parts of an internal combustion engine?

The correct choice identifies the fundamental components that are essential for the operation of an internal combustion engine. The cylinder is where the fuel-air mixture is compressed and ignited, allowing for the conversion of chemical energy into mechanical energy. The piston moves up and down within the cylinder, transferring the force generated by combustion to the crankshaft. The crankshaft plays a crucial role by converting the linear motion of the piston into rotational motion, which ultimately powers the vehicle.

Additionally, the fuel system is vital, as it is responsible for delivering the fuel-air mixture to the cylinder for combustion. Each of these components works in a coordinated manner to enable the engine to function smoothly and efficiently. Understanding these components is foundational for anyone studying mechanical engineering or automotive technology, as they represent the core mechanics of how internal combustion engines operate.