Answer:
The correct words for the blank spaces are: EF4 (Devastating damage); F3 (Severe Damage).
Step-by-step explanation:
The Fujita Scale (F Scale) also known as the Fujita-Pearson Scale (FPP Scale) measures and classifies the intensity of tornados. The scale bases its rating on the destruction caused by the tornado. The scale was modified in the United States in 2007 renaming it as the Enhanced Fujita Scale (EF Scale). The differences are mentioned below:
Fujita scale
F0: 1< 73 mph (Light damage)
F1: 73–112 mph (Moderate damage)
F2: 113–157 mph (Considerable damage)
F3: 158–206 mph (Severe damage)
F4: 207–260 mph (Devastating damage)
F5: 261–318 mph (Incredible damage)
Enhanced Fujita Scale
EF0: 65–85 mph (Light damage)
EF1: 86–110 mph (Moderate damage)
EF2: 111–135 mph (Considerable damage)
EF3: 136–165 mph (Severe damage)
EF4: 166–200 mph (Devastating damage)
EF5: >200 mph (Incredible damage)