It's either internal or psychological
B. a German legend
^.^ Your welcome. <3
Even though Esquivel knows the story of maiz is a myth, she nevertheless warns her daughter not to step on a kernel of corn because the corn represents fertility and the kernels are part of the ritual. It would be wrong, or perhaps even sinful to step on such an important symbol of their culture which is why Esquivel doesn't want her daughter to be in some kind of danger because of such a reckless act.
The final draft. It's the stage where you want to fix minor details before turning it in, correcting the small stuff like grammar and spelling and punctuation.