not silly at all Steve ,
you get your bees and then they stay with you for a long time , if properly looked after !!!. In the winter they form a tight clump within the hive and live off of stored honey . So, when spring comes around they stir and start searching for early food . During the year the workers have a very short life , but the Queen can last for years . During the season they can swarm , starting a new colony . The old one then rebuilds and gets strong again with a new Queen . They will do all this on their own , but it is the job of the beekeeper to manage the hive , feed when needed, split to prevent swarming and creat new colonies, and to take honey (if there is enough ?) and generally keep things tidy. This he/she does so they can have honey , wax, pollen etc , for their own use.
cheers
Russ