Use the richter scale to indicate the an earthquake and the mercalli intensity scale to indicate the damage produced by, strength the strength of, damage produced the focus of, surrounding areas the surrounding areas of, focus

Correct B). The strength of, damage produced

The Richter scale is a type of scale which is used to measure the strength of an earthquake. It measures the seismic energy released by the earth. It was developed by Charles Richter in 1935.

The Mercalli intensity scale is a scale, which is used to measure the intensity of the earthquake. It tells the damage caused by the earthquake. If the intensity of an earthquake is high the damage caused will be more.

the supermassive black hole is in the middle of the galaxy.