Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


This is because the frequency of the sound wave caused by the earth is less than 20hz which can be heard by animals which makes them alert, and hence their behaviour can be regarded as an alarm to sense earthquake. Hope its correct and it helps..☺
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts