Question

question 19
what is the scientific instrument used to record the ground motions produced by an earthquake?
seismometer
tidal gauge
strain gauge
seismic wave

Explanation:

A seismometer is a scientific instrument that detects and records ground motions, including those caused by earthquakes. A tidal gauge measures sea - level changes. A strain gauge measures strain (deformation) in an object. A seismic wave is the energy wave produced by an earthquake, not an instrument.

Answer:

Seismometer