Final answer:
X-rays have the shortest wavelength among the types of electromagnetic radiation listed, which also include visible light, infrared, ultraviolet, and radio waves.
Step-by-step explanation:
The type of electromagnetic radiation with the shortest wavelength is E) X-rays. Electromagnetic radiation is classified by its frequency, and the order of increasing frequency is radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. The correct order based on wavelengths (from longest to shortest) would therefore be radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. It's important to note that electromagnetic radiation with shorter wavelengths tends to have higher frequencies and more energy.