The scale used for measuring earthquake intensity is ___________.

Correct option is C

The correct answer is (c)  Mercalli scale 
Explanation:
· The  Mercalli scale (specifically the Modified Mercalli Intensity scale, or MMI) measures the  intensity of an earthquake, which is based on the visible damage caused by the event and the subjective human observations of shaking.
· The scale ranges from I (Not felt) to XII (Total damage). 
Information Booster:
· The  Richter scale, in contrast to the Mercalli scale, measures the earthquake's  magnitude (the amount of energy released), which is an objective, instrumental measurement that is a single value for any given earthquake.
· The Mercalli scale value, or intensity, will vary from place to place depending on factors like distance from the epicenter and local geology, while the magnitude remains constant. 
Additional Knowledge: (a)  Richter scale
· Measures the magnitude of an earthquake based on the amplitude of seismic waves recorded by a seismograph. (b)  Manometer
· A device used for measuring the pressure of fluids (liquids or gases). (d)  Bernoulli's scale/principle
· Refers to Bernoulli's principle in fluid dynamics, which describes the relationship between fluid speed, pressure, and height.