Fad diets are marketing ploys to promote a concept that has more to do with making money than with a well-balanced diet that promotes long-term compliance conducive with a healthy lifestyle. Many of these diets are also low calorie diets. A low calorie diet is a diet that provides extremely low calories in order to produce significant weight loss. They can be unbalanced and cause problems.
A physical change is a change that the molecules of the article do not change so the answer is a match chopping a piece of wood :)))) i hope this is helpful have a nice day
