Concept:Hyphae are the basic structural units of the fungal body.
Explanation:Fungi are heterotrophic organisms with a body made of long, fine threads called hyphae.
These thin, tubular, transparent threads are produced by many fungi.
The hyphae contain protoplasm and are covered by a wall.
Numerous hyphae intertwine to form the mycelium, which is the main body of the fungus.
Hyphae can be of two types: aseptate (without cross‑walls, multinucleate) or septate (with cross‑walls, cells may have one or more nuclei).
Yeast is a single‑celled fungus that does not form true hyphae; instead, it reproduces by budding.
Thus, hyphae are not produced by yeast, nor are they reproductive cells, nor do they prevent water loss.
Answer:B. thin threads formed by many fungi.