Which tool is described as seismic devices (sensitive to movement)?

Which tool is described as seismic devices (sensitive to movement)?

• A. Seismic devices
• B. Listening devices
• C. Cameras (fiber optics)
• D. Thermal imagers

Answer: (A)

Detecting ground motion is the focus here. Seismic devices are built to sense vibrations and movement of the Earth’s surface, with instruments like seismometers or accelerometers that pick up tiny shifts in ground motion and convert them into electrical signals for analysis. This makes them the tool described as sensitive to movement. The other tools are designed for different signals: listening devices pick up air-borne sound, cameras (fiber optics) capture light and visual patterns, and thermal imagers detect infrared radiation and heat. None of those are primarily used to measure ground vibrations the way seismic devices are.

Detecting ground motion is the focus here. Seismic devices are built to sense vibrations and movement of the Earth’s surface, with instruments like seismometers or accelerometers that pick up tiny shifts in ground motion and convert them into electrical signals for analysis. This makes them the tool described as sensitive to movement. The other tools are designed for different signals: listening devices pick up air-borne sound, cameras (fiber optics) capture light and visual patterns, and thermal imagers detect infrared radiation and heat. None of those are primarily used to measure ground vibrations the way seismic devices are.