Which of the following is an example of a trend?

a general direction in which something is developing or changing."an upward trend in sales and profit margins"synonyms:tendency, movement, drift, swing, shift, course, current, direction,progression, inclination, leaning; More2.a fashion."the latest trends in modern dance"synonyms:fashion, vogue, style, mode, craze, mania, rage; Moreverb1.change or develop in a general direction."unemployment has been trending upward"synonyms:move, go, head, drift, gravitate, swing, shift, turn, incline, tend, lean, veer"interest rates are trending up"2.(of a topic) be the subject of many posts on a social media website within a short period of time."I've just taken a quick look at what's trending on Twitter right now"