Okay kiddo, let's talk about dependency relation.
Imagine you want a chocolate cake, but you can't make it all by yourself. You need a recipe, ingredients, and someone to help you bake it. You depend on these things to make the cake.
Dependency relation is sort of like that – it's when something needs other things to exist or work properly. For example, a tree depends on air, water, and sunlight to grow, and the sun depends on hydrogen atoms to make energy.
In computer programming, we also use the term dependency relation. Say you're making a website, and you want to use a cool new tool that someone else made to add a fun little animation to your site. That tool depends on other things to work, like a certain programming language or a specific version of another tool. If those things aren't there, the tool won't work.
So, dependency relation is all about things needing other things to function or exist, like a cake needs ingredients and a recipe, or a tool needs specific software to run. Pretty neat, huh?