Gamma rays have the highest frequency out of all the listed electromagnetic waves.

Here's why:

* Electromagnetic Spectrum: These waves all belong to the electromagnetic spectrum.

* Frequency and Wavelength: Frequency and wavelength are inversely proportional. Higher frequency means shorter wavelength.

* Order from Lowest to Highest Frequency:

* Radio Waves

* Microwaves

* Infrared

* Visible Light

* Ultraviolet

* X-rays

* Gamma Rays

Think of it like this: Gamma rays have the most energy, which is related to their high frequency.