Choose the correct option:
Statement 1: Some animals start showing abnormal behavior before earthquake comes. However, human beings do not feel anything before the main shock.
Statement 2: Earthquake produces infrasonic waves, with a frequency less than 20 Hz, before the main shock. Some animals are able to perceive the infrasonic waves so they start showing abnormal behavior. However, human beings are not able to perceive these infrasonic waves. So, they don't show any reaction.
Both Statements are correct and statement 2 is the correct explanation for statement 1
Earthquake produces infrasonic waves, with a frequency less than 20 Hz, before the main shock. Animals that can perceive infrasonic waves get alerted and start showing abnormal behavior. However, human beings are not able to perceive these infrasonic waves. So, they don't feel anything.