Why does my Audi A1 make a whining noise when I accelerate?

I've noticed a high-pitched whining noise whenever I accelerate in my Audi A1, but it disappears when I release the gas pedal. What could be causing this?

It is likely that your car's serpentine belt is worn or needs to be replaced. This belt is responsible for running various components in your engine and can make a whining noise when it starts to wear down.

Another possibility could be a problem with your car's power steering pump. If this pump is failing, it can cause a whining noise when the engine is under load.