It measures the intensity of an earthquake which can be determined by its destruction effect. The Ritcher scale on the other hand mostly measures the energy of an earthquake. The Mercalli scale ranges from I (no destruction) to XII (Total destruction).
Earthquakes occurs due to the sudden trembling of the earth. These releases energy due to the propagation of seismic waves in the interior of the earth. These earthquake can cause great damages depending upon the intensity and magnitude of the earthquake.
The Mercalli scale was invented by Giuseppe Mercalli, in the year 1902. This scale measures the intensity of an earthquake. This intensity is marked by the amount of damage it causes in a particular area. It does not determine the magnitude of the earthquake. These scale ranges from I to XII, where I depicts a earthquake of least intensity, and XII depicts an earthquake of maximum intensity and it is very destructive.
<span>The best and most correct answer among the choices provided by the question is the first choice. One can adapt to the sunny environment by wearing sunglasses. I hope my answer has come to your help. God bless and have a nice day ahead!</span>