Factors that distinguish public speaking from other forms of communication include

The answer is that the factors include "opportunities for feedback, level of preparation, and degree of formality".

Public speaking or Open talking is the point at which you remain before a crowd of people and convey a discourse at a formal or a casual event. For some, individuals, talking before a vast group of onlookers is an overwhelming assignment, so it is very normal to become extremely apprehensive (however with viable preparing this could be overcome).