Propagation state Effects section

Hello,
I have a little confusion with what is explained in the Effect section about the propagation of data.

Brian says that propagation happens when `setBreed("")` is called. I understand that, but I decided to comment that line and just call `setBreeds([])` instead. Surprisedly, the propagation happened, that means that the BreedDropdown re-rendered.

This is how I let useEffect

This is my main doubt.

Why the BreedDropDown updates? If I updated Breeds only. The main relation I can see between Breeds and BreedDropdown is the statement `const [breed, BreedDropdown, setBreed] = useDropdown("Breed", "", breeds);`. If some input of the hook is updated, this is re-rendered? or it is just a misunderstanding?

Thank you for reading my issue.

Start by rereading the Effect section and tracing the shown useDropdown call with setBreed, setBreeds, breeds, and BreedDropdown. Clarify why updating breeds causes BreedDropdown to re-render, and update the explanation so the relationship is understandable to readers.

Written by the indexing model from the issue text.