What are the two components of a radio wave?

A radio wave is a specific type of electromagnetic radiation. As the term "electromagnetic" suggests, the wave is fundamentally composed of oscillating electric and magnetic fields traveling together through space. While a transmitter uses voltage and current to create these fields at the antenna, voltage and current are properties of physical electrical circuits, not the radiated wave traveling through the air. Similarly, impedance and reactance describe circuit characteristics, making those distractors incorrect.