What is represented by the blue lines on the wave diagram?
A. crest
B. trough
C. amplitude
D. wavelength
![What Is Represented By The Blue Lines On The Wave DiagramA Crest B Trough C Amplitude D Wavelength class=](https://ph-static.z-dn.net/files/dfd/3c7f8bec4a8b7d877db8f04568148db5.jpg)