Current movement toward or away from style or interest is
A) trend
Step-by-step explanation:
Trend is the word used to define what is in fashion at any given time in that what is being done by the most amount of people or what is being thought about by most of the people in a market.
This is also a volatile thing as often times there are many trends working at the same time and there is also a short life for most of the trends.
Some trends last for years and these ones are the most profitable to cash on in the long run as they give returns for a long time.