Answer:
b) seismograph
Explanation:
now a days it is modern technology and used to measure the frequency of earthquake but even this instrument can not suggest us anything before earthquake
seismograph is the ans b
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Answers & Comments
Answer:
b) seismograph
Explanation:
now a days it is modern technology and used to measure the frequency of earthquake but even this instrument can not suggest us anything before earthquake
Answer:
seismograph is the ans b