Answer: The correct option is D(Visible light occupies a small part of the electromagnetic spectrum and can travel in a vacuum.)
Explanation: An electromagnetic spectrum describes the distribution of the electromagnetic waves according to their frequency and wave length. The electromagnetic waves in the spectrum arranged from the longest wavelength to the shortest wavelength includes:
radio waves,
microwaves,
infrared,
visible light,
ultraviolet,
X-rays, and
gamma rays
Visible light in the spectrum occupied the wavelength that the human eye can detect. It consist of seven wavelength ranges that includes the following colours:red, orange, yellow, green, blue, indigo, and violet.
It occupies a small part of the electromagnetic spectrum and can travel in a vacuum.