Its mainly flat and semi arid grasslands
Answer:
False is the answer
Explanation:
i dont know how to explain it i just know
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The correct answer is frequency
The Doppler effect is characterized by the change in the sound frequency emitted by a source, perceived by an observer when there is relative movement. A typical example of the Doppler effect is the case of an ambulance with the siren on, during the approach or removal of an observer.