An instrument that records earthquakes is A. Ergograph B. Ediograph C. Thermograph D. Seismograph

The correct answer is D. Seismograph.

A seismograph is an instrument that measures and records ground motion. It is used to detect earthquakes and other seismic activity. The seismograph was invented in 1880 by John Milne.

The main parts of a seismograph are the seismometer, the amplifier, and the recorder. The seismometer is the part of the seismograph that detects the ground motion. The amplifier amplifies the

signal from the seismometer so that it can be recorded. The recorder records the signal from the seismometer on a seismogram.

A seismogram is a graph that shows the ground motion recorded

by a seismograph. The seismogram can be used to determine the location, magnitude, and time of an earthquake.

The other options are incorrect because they are not instruments that record earthquakes.

• Ergograph is an instrument that measures muscular work.
• Ediograph is an instrument that records the movements of the eye.
• Thermograph is an instrument that records temperature.