Answer:
Amplitude
Explanation:
A wave is a periodic oscillation that carries energy, but not matter, through space or through a medium.
A wave is characterized by the fact that the particles in the medium oscillate around a fixed point, but there is no overall movement of particles in the direction of the wave (this means, only energy is transferred, while matter is not transferred).
A wave is also characterized by several properties, namely:
Amplitude: it is the maximum distance the particles of the medium move from their resting positions
Frequency: the number of oscillations of a certain particle per second
Wavelenght: the distance between two points of the wave that have same shape
Period: the time it takes for one particle of the wave to complete one oscillation
So, the answer is
Amplitude
