Final answer:
The color red has the lowest frequency and longest wavelength among the given options in the visible spectrum.
Step-by-step explanation:
The color that has the lowest frequency among the options is red. In the visible light spectrum, red light has both the longest wavelengths and the lowest frequencies.
When ordering the colors from shortest wavelength to longest wavelength, the correct order would be blue, green, yellow, orange, and red, which also corresponds to ordering them from highest frequency to lowest frequency. Therefore, the answer to which color has the lowest frequency is red.
The color with the lowest frequency among the given options is red. In the visible light spectrum, red light has the lowest frequency and longest wavelength, while violet light has the highest frequency and shortest wavelength.