Backsplashes on a stainless fixture that fits against a wall must be:

The correct response emphasizes the importance of sealing backsplashes to the wall for practical and sanitary reasons. When a stainless fixture with a backsplash is installed, it is crucial to prevent moisture from seeping behind the fixture. Sealing the backsplash to the wall creates a barrier that helps to control potential water damage, mold growth, and keeps the area clean. This is especially important in kitchen or food-preparation areas, where hygiene is a priority.

Choosing a backsplash that is sealed to the wall also ensures that the fixture maintains a professional appearance and is easier to clean, enhancing both functionality and aesthetics. Other factors like height adjustment or removability do not address the primary concern of preventing water infiltration and maintaining cleanliness along the wall. Thus, sealing backsplashes effectively addresses both safety and hygiene concerns in an installation context.