Final answer:
The most appropriate comparison is that wavelength is inversely proportional to frequency, indicating that increased wavelength results in decreased frequency. Wavelength is measured in units of distance and describes the spatial period of the wave.
Step-by-step explanation:
The correct comparison in relation to wavelength and other wave characteristics is a) Wavelength is inversely proportional to frequency. This means as the wavelength increases, the frequency decreases, and vice versa. The wavelength of a wave is depicted as the distance between two consecutive identical points on the wave, such as two crests or two troughs, which lies parallel to the direction of the wave's propagation. It can be measured in various units of distance, with meters being common.
The amplitude of a wave is its height and shouldn't be confused with the wavelength. Frequency refers to the number of waves passing a given point per unit time and is measured in hertz (Hz), or cycles per second.
These principles are fundamental to understanding the behavior of different types of waves, including those in the electromagnetic spectrum, where various frequencies and wavelengths correspond to different forms of electromagnetic radiation.