Final answer:
Gamma rays have the shortest wavelength among the electromagnetic radiation types listed, making them the most energetic and potentially hazardous.
Step-by-step explanation:
Among the different types of electromagnetic radiation listed, gamma rays have the shortest wavelength. This places gamma rays at the highest frequency end of the electromagnetic spectrum, which is constituted in order of increasing frequency by radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Since shorter wavelengths correspond to higher frequencies and more energy, gamma rays are the most energetic of these types of radiation and can be quite dangerous to living systems.