What are hierarchical methods?

Hierarchical methods are like sorting your toys into bigger and smaller groups based on how similar they are.

Imagine you have a big box full of different toys, cars, dolls, blocks, balls. You want to organize them so it's easier to find what you're looking for. With hierarchical methods, you start by grouping the most similar toys together first, like putting all the cars in one pile and all the dolls in another. Then, you look at those piles and group them again, maybe cars and balls are both things you can roll, so you put them together. This keeps going until everything is sorted into big groups that make sense.

Think of it like building a tower with your blocks. You start with the smallest block on top, that’s like the most detailed group. Then each level below adds more blocks, bigger groups made by combining smaller ones. At the bottom, you have the whole tower, all your toys grouped together in one big category.

This way, you can see how things are related at different levels, from tiny details up to the whole picture!