Question

A traditional story that explains a belief system, a natural phenomenon, or a world view of a group of people is called a what

Answer 1

I believe the answer is myths.Hope this helps. (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ 

Answer 2

These types of stories are called "myths" and all the myths of a nation collected are called the mythology. Famous examples of mythologies are Greek Mythology (gods such as Zeus, Hercules, and similar), and Egyptian Mythology (gods such as Osiris, Anubis, and similar).