Answer:
A fad is a temporary by widely copied activity.
Step-by-step explanation:
A fad is when some object or idea gains quickly and intensely in popularity, but support for the idea or use of the protect tends to wane in a relatively short period of time. One contemporary example are fad diets like the Keto diet, for example, or Atkins that was popular just a few years ago. Usually, the initial popularity is based on some attribute or quality that turns out to be exaggerated in reality or in practice is proven that such results are exceptional rather than widespread.