In 3-5 bullet points, why was the colombian exchange an important part of world history?

Because Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population.
I hope this help you if I am wrong then sorry about that

Interesting question by the way. you might experience a little nervous shaking here and there but not to apparent.

The answer is a i believe