That statement is mostly true, but it needs a small correction.

Here's why:

* Hyphae are the building blocks: You are absolutely correct that the main body of a fungus (called the mycelium) is made up of many-celled threadlike tubes called hyphae. These hyphae grow and branch out, forming a vast network.

* Not all fungi have hyphae: There are some types of fungi, like yeasts, that are single-celled and don't form hyphae. They reproduce by budding, a different process than the hyphae-based reproduction of multicellular fungi.

So, while most fungi have a body made of hyphae, it's not universally true for all types of fungi.