A) Endoscope
B) Thermometer
C) Sonograph
D) Seismograph
Correct Answer: D
Solution :
A seismograph, or seismometer, is a sensitive instrument used to detect and record earthquakes. Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with seismographs.
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