You said "module on operating systems" is this a secondary school(high school) or college class on operating systems? Shouldn't you be reading & testing & experimenting & searching for the answers and not asking for help. I am not doing this to be mean or to hurt you. You need to learn how to learn and you need to learn on your own. If I just give you the answers, then you have learned to ask someone else and not have learned how to learn and probably not have learned the subject too. A simple google search for lilo boot block turns up an answer to your question. Google is a great resource. See google search for linux kernel stored /boot lilo. There are many many tutorials, FAQs & guides on Linux. Here are three:
http://oldfield.wattle.id.au/luv/boot.html
http://linux-newbie.sunsite.dk/html/lnag.html
http://www.linux-tutorial.info/index.php