Answer:
Wavelength = the distance between two adjacent peaks of the wave.
Step-by-step explanation:
The wavelength of a wave is defined as the distance between two adjacent peaks of the wave or it is defined as the distance between two consecutive crests and troughs. It is denoted by
. Its SI unit is meters.
The relation between the frequency and the wavelength is given by :
![v=\\u* \lambda](https://img.qammunity.org/2020/formulas/physics/high-school/9uljigxqoafn3i9vdpdch7nf86fot7972o.png)
Where
v is the speed
So, the correct option is (a). " the distance between two adjacent peaks of the wave".