Why are industries so diverse? How are they related?

Industries are diverse because they produce different products necessary for human economic activity.
Industries are interconnected. For example, the electric power industry provides the activities of enterprises of all industries, producing electrical energy. Mechanical engineering provides other branches of the industry with machine tools for factories and factories. The electronics industry provides other industries with computers, electronic equipment, without which enterprises would not be able to function. The mining industry provides metallurgy with metal ores, from which steel and other metals necessary for the country’s economy are then smelted; the chemical industry provides oil, from which gasoline is made; energy is provided by extracted natural resources such as natural gas and coal.