Which system type includes both transmission systems and distribution networks?

The correct answer is power systems. Power systems encompass the entire infrastructure and network required for generating, transmitting, and distributing electricity from power plants to consumers. This includes not just the high-voltage transmission lines that carry electrical energy over long distances, but also the distribution networks that deliver this energy to businesses and homes at lower voltages.

The inclusion of both transmission and distribution in power systems is fundamental to understanding the overall operation and flow of electrical power. Transmission systems handle the bulk transfer of electrical energy, while distribution networks are responsible for distributing that energy to end-users. This integrated approach allows for the efficient delivery of electricity, ensuring reliability and stability in power supply.

Other options do not cover the entirety of electrical energy movement and management. Circuit systems generally refer to electrical circuits without emphasizing the broader network structure. Communication systems are focused on the transmission of information rather than electric power. Control systems pertain to the methods used to control electrical operations but do not inherently include transmission or distribution networks associated with power.