Correct answer: A). The Richter scale provides a single measurement while the Mercalli intensity scale can produce multiple measurements depending on the area affected
The Mercalli intensity scale is used to measure the intensity of an earthquake, while the Richter scale is an absolute scale, which is used to record the earthquake.
The Modified Mercalli scale measure how they react and feel the shaking of the earthquake. The Mercalli intensity scale can produce multiple measurements, while Richter scale gives a single measurement.