On what criteria is the fujita scale for tornadoes based ?
a. wind velocity
b. storm surge height
c. duration of storm
d. amount of destruction

The best and most correct answer among the choices provided by the question is the fourth choice or letter D "amount of destruction"

The Fujita scale (F-Scale), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation.

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