Big shout out for enumerating questions. Makes it clear you need an answer for each one. Makes it easier to follow up if you need more info on a particular question. Makes it easier to pester the person with “hey, I need an answer to 2 by EOD or project deadlines will be significantly impacted” (copied to your PM).
People’s poor reading comprehension is annoying. But the right move is to do everything you can to get the answers you need, creating a polite paper trail as you go. Usually the other person will get you the info you need sooner if you pester them enough, with the implied threat that you are building a case against them if the project is delayed. Because if they don’t answer your questions in a timely fashion when you do everything possible to get the answers you need, it is their fault.
This seems true only on short time scales, and in corporate work structures. On long time scales and with more collaborative, voluntary work structures, a group of people working together and supporting each other will almost certainly outperform a disorganized collection of non-communicative individuals. We can see this is true because, yaknow, society exists.