The answer is b because it polar bears will be in a non fiction story and periodical is a magazine or newspaper published at regular intervals.
Answer:
Isaac Newton changed the world by adding scientific and mathematic knowledge to the world that we still use today. Isaac Newton figured out the principal of gravity and develop the universal law of gravitation. This changed the world because he didn't only establish a law of gravity for one specific place, his law was universal.
Use specific pronouns that are connected with the point of view they are writing in. I personally would write in first becauseit is a personal narrative.
