What is a key feature of simple machines within a compound machine?

A key feature of simple machines within a compound machine is that they work together to accomplish tasks. In a compound machine, which is made up of two or more simple machines, each simple machine contributes its own mechanical advantage and functionality to make a complex task easier or more efficient. For example, a pulley, lever, and wheel and axle can be integrated into a single device to lift heavy objects effectively. The collaboration of these simple machines allows for greater overall efficiency and enables the compound machine to perform functions that a single simple machine cannot achieve alone. This interdependence is crucial for the performance and effectiveness of compound machines in various applications.