We can increase the pitch of a sound by
increasing its ?
A. amplitude
B. wavelength
C. wave speed
D. frequency

A: Frequency

The frequency of the wave corresponds to the perceived pitch of a sound. Higher frequency’s have higher pitches

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Answerthe global climate during the paleogene departed from the hot and humid conditions of the late mesozoic era and began a cooling and drying trend which dispite having been periodically disrupted by warm periods such as the paleocene-eocene thermal maximum, persists today;