This circuit diagram lacks a basic feature of a circuit. which basic feature is missing from the circuit? a) an energy source b) conducting wires c) a switch d) a device that uses energy

The basic feature that is missing from the circuit is D) a device that uses energy

The correct answer is the option D. Hence a device that uses the energy is missing in the circuit.

Normally the circuit is something/picture which graphically represents the electrical circuit. It is generally a closed pathway containing different devices.

A general electric circuit includes:

So in above circuit there are first two components missing third one which as a indicator or device through which current will pass.

their crystal patterns have been disrupted by stress