Answer:
Conflict with others means disagreement on some or the other topic.
An example can be the making of the plan by friends and they are not agreeing to the same point.
Conflict with nature means that the person is not satisfied with the nature of the other person.
An example would be the reaction of the other person on a particular incident according to his nature but disliked by others.
Conflict with oneself means that the person is in confusion regarding his plans or actions or his own self.
For example, when he is planning to change his certain habit or introduce some new habits in his life.