Final answer:
The electromagnetic energy with the highest frequency is ultraviolet.
Step-by-step explanation:
The correct answer is c) Ultraviolet.
The electromagnetic spectrum is a range of electromagnetic waves that vary in frequency and wavelength. Frequency is a measure of how many waves occur in a second, while wavelength is the distance between two corresponding points on consecutive waves.
As you move along the electromagnetic spectrum, the frequency increases and the wavelength decreases. Therefore, the wave with the highest frequency would be found at the top end of the spectrum. Ultraviolet radiation starts with frequencies just above violet in the visible range, making it the electromagnetic energy with the highest frequency among the given options.