What is point of view in literary fiction and filmmaking? What makes it important and how many different types of POV are there? Why?

Fill in the blank with correct word

Point of view in literary fiction generally concerns the narrator, through whose
words the events of a story are understood. The ideas and incidents are sifted through the
consciousness and language of the storyteller. He or she may or may not be a participant
in the action, and may or may not be a reliable guide for the reader to follow. There are
four basic types of point of view in literary fiction: (1) the first person, (2) the omniscient,
(3) the third person, and (4) the objective. In movies, point of view tends to be less
rigorous than in novels, for although there are cinematic equivalents of the four basic
types of narration, fiction films tend to fall naturally into the omniscient form.