What would be the best way to learn the cases in german?

Why does first person point of view limit the information a reader knows about other characters in the text? a) if a story is told in a point of view such as first- or third-person limited, the reader has access to less information regarding thoughts and emotions of other characters. b) the other characters do not have interesting stories to tell, so that is why anne doesn’t include more details. c) the diary of a young girl is not written in first person point of view. d) first person point of view does not limit what we know about other characters. it is the all-knowing point of view.

1. im mätchen frisst der wolf die großmutter.2. der arzt verbindet den krauken.3. den brief liest man ihnen nicht er.4. hunde beißen oft briefträger.5. der rauber vergrab den scgmuck im garten.*put in on passiv in german plsss*

Memeee for my german homework eehe