Here's why:

* Amplitude refers to the maximum displacement of a wave from its resting position. This displacement can be measured from the crest (highest point) to the equilibrium point or from the trough (lowest point) to the equilibrium point.

* The amount carried is a bit ambiguous. It could refer to the energy carried by the wave, which is directly proportional to the square of the amplitude. A wave with a larger amplitude carries more energy.

So, to be precise:

* Amplitude is the height of a wave.

* The amount carried could refer to the energy of the wave, which is related to its amplitude.

Let me know if you'd like more details about waves and amplitude!