What type of fungus grows in filaments, creating a fuzzy appearance?

The correct answer is Mould. Mould is a type of fungus that typically grows in a filamentous structure, which gives it that characteristic fuzzy appearance. These filaments are known as hyphae, which can spread out to form networks called mycelium. This dense, thread-like growth is what creates the visual texture associated with mould.

Mould plays various roles in different environments, including decomposition, which contributes to nutrient cycling. It can be found in many habitats, including soil, decaying organic matter, and on various food products, where it may be recognized as spoilage.

In contrast, yeast, another type of fungus, grows in a single-cell form and does not have a filamentous structure, making it appear smooth rather than fuzzy. Bacteria are single-celled microorganisms that have very different growth patterns compared to fungi, lacking the filamentous structure entirely. While fungi encompass both mould and yeast, the specific fuzzy appearance is distinctly associated with mould.