What do retroviruses do that is different from other viruses?

Unlike a virus, a retrovirus inserts its genome into the host's genome. In this way, the retrovirus becomes part of your cells.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.