Answer: Paragraph 3 describing the functions and details of wavelengths and frequencies. This paragraph provides information about peaks, troughs, hertz (Hz), and even mentions amplitude. Wavelength is “the horizontal distance from peak to peak (or trough to trough).” Frequency is “how many peaks go by in a certain amount of time.” Amplitude is determined by getting the “vertical distance from the height of the peak to the level of the trough” and dividing it by 2. Paragraph 3 includes those details to allow the reader to learn about the functions within waves and the properties of these functions. This paragraph teaches the reader what a peak and a trough is, what wavelength is, what the frequency is, what amplitude is, what hertz is/how it works, and how all of these things work together in a wave.
Explanation: The paragraph includes information about the functions of many properties within a wave, you can tweak my answer how you see fit, but I hope it helped!
