Which of the following describes a room that typically contains a bathtub or shower?

The term that accurately describes a room typically containing a bathtub or shower is "Bathroom." This term is widely recognized and encompasses any space dedicated to personal hygiene, often featuring essential fixtures such as sinks, toilets, and bathing facilities like bathtubs or showers.

While "Restroom" may refer to a public facility designed primarily for toilet use, it doesn't inherently indicate the presence of bathing amenities. "Sanitation area" is a broader term that might refer to a space focused on cleanliness and hygiene, but it lacks the specificity of a traditional bathroom setup. "Hydrotherapy space" suggests a specialized area designed for therapeutic purposes involving water, which is not the general definition for a bathroom. Thus, "Bathroom" stands out as the most precise term for a room that typically includes a bathtub or shower.