Here's why:
* Voltage is the difference in electrical potential energy between two points. It's like a pressure difference that pushes electrons from an area of high potential to an area of low potential.
* Current is the flow of electrons. The higher the voltage, the greater the pressure, and the more electrons flow (higher current).
Think of it like a water pipe:
* Voltage is the pressure difference in the pipe.
* Current is the amount of water flowing through the pipe.
Without voltage, there's no pressure to move electrons, and no current flows.