Information about polar bears is important for people to learn because polar bears are becoming extinct so it’s best to learn more about them, if more people know about them they’ll try to help them, besides they are also part of the food chain.
I can't see the examples. But assonance means a resemblance in the sounds of words or syllables either between their vowels (e.g., meat, bean) or between their consonants (e.g., keep, cape).
On Netflix, you can find movies that are on DVD(s). With DVD(s) you can watch movies/episodes on it that Netflix has/had. You can watch movies and episodes on Netflix and on DVD.
Those are the similarities that Netflix and DVDs has in common.
Good luck on you project too.