HELP PLS THIS IS SO HARD AH

1. The box like figure in the given image is the [BATTERY SOURCE] from where the current drawn into the circuit.

2. A string connecting positive terminal of battery to the bulb is an [ELECTRIC WIRE] through which current flows in the circuit.

3. A bubble like object in the circuit is a [BULB] which lights up when current moves through the circuit.

4. A component connected to the negative terminal of batter source is a [SWITCH].

The answer are uppercase.

I hope this helps c:

Outermost (valence) electrons