The correct answer is C. Hyphae
Step-by-step explanation:
Mold is a type of organism that belongs to the fungi kingdom and includes multiple fungal species. This type of organisms are multicellular and grow through filaments that are called hyphae, which are the structures that allow molds to grow and replace other structures such as roots and leaves in the plant kingdom. A hypha is composed of different cells in a tubular structure instead of the cellulosic cells found in plants. Therefore, instead of having roots and leaves molds grow as thread-like filaments which are called hyphae.