Energy is the source of voltage

when the magnitude of voltage of a source is controlled by another small voltage source in the circuit the former is called voltage controlled voltage source and the later is called controller voltage source.

Yes.Source transformation in dependent voltage source can be solved the same like independent voltage source

The voltage source is the source of the electricity.

The conductor is what the electricity flows through to reach its destination.

Example: A battery is a voltage source and an electrical wire is the conductor.

A current source varies the output voltage to maintain the desired current. A voltage source has a constant output regardless of the current draw (up to the capacity of the supply, of course).