Final answer:
Glazed ceramic tile is the type of tile used for facing walls and partitions in areas with heavy wear, moisture, and sanitation needs due to its durable and impermeable glazed surface. Option B is correct.
Step-by-step explanation:
The type of structural clay tile characterized by having a glazed surface and is used for facing walls and partitions, especially in areas subject to heavy wear, moisture, and strict sanitation requirements, is b) Glazed ceramic tile. These tiles are, as the name implies, coated with a protective glaze which makes them impermeable to water and stains.
This characteristic is particularly useful in spaces like kitchens, bathrooms, and hospitals where cleanliness is a top priority. They are also quite durable, making them suitable for areas that receive a lot of traffic.
Stones such as limestone have been traditionally used for construction, however, for areas where hygiene is a concern, or there is significant exposure to moisture, glazed ceramic tiles are preferable.
Terracotta, which means "baked earth", is also a type of earthenware and is clay-based, but it is typically unglazed and porous, making it less suitable for such applications. Mosaics, on the other hand, may use materials like glazed tiles, but they are more focused on decorative applications rather than structural ones.