What is an unreliable narrator? What makes him/her unreliable?

In “the things they carried”, why is jimmy unsure when martha calls the pebble “a token of her truest feelings”

Plz i need answer 50pts3.02 outlinecharacters(who will the characters be? kate and mr. jacks should probably return. but are there new characters that you’ll introduce? are they inspired by characters you’ve read about in the past or people in your real life? ): setting(the story should probably start on the edge of the forcefield, but where else should kate go on her journey? ): conflict(kate solved one problem by escaping the forcefield. what's the new problem she’ll have to overcome? ): rising action 1(how does the new problem become worse? ): rising action 2(how does the new problem still get even worse? ): climax(what will be the most exciting part of this continuation of “grounded”? how does the new problem begin to turn around? ): resolution(how is the new problem solved? ): reflection (possible theme or lesson the character, and readers, learn? try to be inspired to write about a theme you’ve encountered in your past experiences with literature or even life.):

Is "words dying" personification? !