Question

waves that transmit energy through matter and or empty space *
wavelength
frequency
wave
electromagnetic wave
radiation

Explanation:

Electromagnetic waves can transmit energy through matter or empty space. Wavelength and frequency are properties of waves. A general 'wave' is too broad. Radiation can be associated with energy - transfer but electromagnetic wave is the most specific term for waves that can travel through matter or vacuum.

Answer:

D. electromagnetic wave