After a while, Anna's father tried a low-carb diet, but he gave it up when he learned about the "paleo" diet. This is a fad illustration.
A fad diet is a diet that becomes popular for a short time, similar to fads in fashion, without being a standard dietary recommendation, and often making unreasonable claims for fast weight loss or health improvements. There is no single definition of what is a fad diet.
To learn more about Fad please visit here:
https://brainly.com/question/12572355
#SPJ4