To correctly label the parts of a wave, you can use the following descriptions for each label:
- Crest - The highest point of a wave.
- Trough - The lowest point of a wave.
- Amplitude - The height of the wave from the midpoint to the crest or trough; it measures the strength of the wave.
- Wavelength - The distance between two consecutive crests or troughs.
You can fit these definitions into the appropriate positions based on a diagram of a wave. If you need assistance with a specific diagram, please provide details.