Is it true that some animals get disturbed before the earthquakes?

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True

False

answer is A.

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Detailed Solution

The above statement is True.
Before the main shock wave, an earthquake generates infrasound. Infrasound is a type of low-frequency sound. It is sound with a frequency lower than

20 Hz

(hertz) or cycles per second, which is the normal limit of human hearing. As frequency decreases, hearing becomes less sensitive, so for humans to perceive infrared sound, the sound pressure must be sufficiently high.
Rhinos have excellent hearing, picking up infrared sounds far beyond the range of human hearing.
Rhinos can hear at a frequency of four hertz, whereas a human baby with perfectly healthy ears can only hear at a frequency of

20 hertz .

Giraffes and elephants can hear in this infrared range as well. As a result, we can see some animals become disturbed and start running around just before earthquakes because they can hear infrasonic sounds.

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