Explanation:
You can use different sentence openers, like 'preposition', 'ly', 'ing', 'wwwasiab', 'Very short sentence', 'ed', 'Abstract noun opener'. I think these are good sentence openers, they make your paragraph go more interesting.
As for the hook, you should not reveal the title you are suppose to be writing about. For ex. I am supposed to be writing tsunamis. I don't write 'tsunami' as the topic. I'll write 'Destructive waves'. That'll usually hook the reader.
The primary source, you should go online and search your 'www/ (your topic)! That would give you a bunch of information. Then you can open one of the websites and chose a good part then put quotations around it then put it in your passage.
Another one is you should use five sense words (taste, smell, sound, sight, touch), you can search online for them.
The last one, (I don't recommend this, cause it's like cheating) search 'EssayTyper' on g oogle, and type the topic in it, and it usually writes you a nice pretty passage. (P.S If you use this, you should probably change the sentences and stuff, then it doesn't really count as cheating)
SORRY, But I am in class, so I don't have time to write a passage, I am not that good either! I just hoped I helped you!
