Task: Instance Description Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes the instance 'ultraviolet'?

A. Coordinate System with its origin on the axis of the Earth and fixed with respect to the stars.
B. the instance climate classification, also known as the polar marine climate classification, is characterized by all months having temperatures above -7 degree C, warmest month above 0 degree C, and annual temperatures less than 17 degree C.
C. A system or flow that evolves slowly in time compared to the rotation period of the earth, has a length scale of the deformation radius or larger, and undergoes only limited vertical excursions.
D. Electromagnetic radiation of shorter wavelength than visible radiation but longer than x-rays.

Answer: Electromagnetic radiation of shorter wavelength than visible radiation but longer than x-rays.