All of the above. The wavelength of a wave is the distance between where the wave is emitted and where it is absorbed. Longer wavelength means higher frequency and lower energy. Longer wavelength means lower frequency and higher energy. Longer wavelength means higher frequency and higher energy.
Longer wavelength means lower frequency and lower energy.
There is no simple relationship because different photons travel at different speeds. X rays have higher energy than radio waves. X rays have higher frequency than radio waves. X rays and radio waves are both forms of light, or electromagnetic radiation. X rays have shorter wavelengths than radio waves.