Which of the following methods is used to perform electrical decomposition?

Electrolysis is the correct answer because it is a method specifically designed for the process of electrical decomposition. This technique involves passing an electric current through a substance that is either in a molten state or dissolved in a solution, allowing it to decompose into its constituent elements. During electrolysis, chemical reactions occur at the electrodes, leading to the separation of elements. For example, water can be split into hydrogen and oxygen gases through electrolysis.

The other options do not pertain directly to the concept of electrical decomposition. An electrical network refers to a system of interconnected electrical components, which does not imply decomposition. Electromagnetic induction involves generating electric current through changing magnetic fields and does not deal with breaking down substances chemically. Feedback typically relates to control systems and responses in automated processes rather than a method of chemical breakdown. These distinctions highlight why electrolysis is recognized as the method for performing electrical decomposition.