Question

which fad diet is based on consuming no calories or a very small amount for a long period?
a) crash diet
b) extreme fasting
c) paleo diet
d) limited food diet

Explanation:

Extreme fasting involves consuming no or very few calories for an extended time. Crash diets are rapid - weight - loss diets but not necessarily long - term with near - zero calories. Paleo diet focuses on ancient - like foods. Limited food diet restricts food types, not just calorie amount for long periods. Extreme fasting directly matches the description of no/very small calorie intake for a long period.

Answer:

B) Extreme fasting