Final answer:
The wave spectral-peak period and the area under the curve of a wave energy spectrum increase as the wind speed, fetch, or duration increases.
Step-by-step explanation:
The wave spectral-peak period and the area under the curve of a wave energy spectrum increase as the wind speed, fetch, or duration increases.
The wave spectral-peak period refers to the time it takes for the highest point of the wave (crest) to complete one cycle. As wind speed, fetch, or duration increase, more energy is transferred to the waves, resulting in longer periods.
The area under the curve of a wave energy spectrum represents the total energy of the wave. As wind speed, fetch, or duration increase, more energy is transferred to the waves, leading to a larger area under the curve.