What simple machine is the steam shovel is in?

A steam shovel is primarily classified as a type of crane, which is a compound machine that incorporates several simple machines. The key simple machines involved are the lever (used in the boom and arm) and the wheel and axle (used in the tracks for movement). The steam engine itself also functions as a machine that converts steam pressure into mechanical work, allowing the steam shovel to perform its digging and lifting tasks efficiently.