Wavefronts show the position of points of a wave which are in phase.
Displacement is the distance moved by the particle from its equilibrium position.
The amplitude of a wave is the maximum displacement of the particle from its equilibrium position.
The wavelength is the distance between 2 successive points on a wave which are in phase with one another.
The period is the time taken for a particle on the wave to complete one oscillation.
The frequency of a wave is the number of complete oscillations that pass through a given point in 1 second. (Units: Hertz(Hz) or s-1)