Final answer:
The subject of the question is Social Studies, and it pertains to high school-grade level materials. It involves the study of hygiene and its implications on cultural values, social norms, and personal habits within society, as well as historical changes in hygiene practices.
Step-by-step explanation:
The textbook discussion on bathroom habits, bathing and dental care, and waste elimination can be classified under the subject of Social Studies. This topic is likely part of a broader exploration of hygiene and its role in society, reflecting aspects such as cultural values, consumerism, social norms, and the development of personal habits. In Social Studies, hygiene may be discussed in the context of how personal habits not only maintain physical appearance but also how they adhere to or reflect societal norms and the value placed on cleanliness. Understanding these routines is essential for comprehending how individuals perform regular life activities and manage personal care within the structure of their cultural and social environments.
Moreover, historical perspectives might be integrated into these discussions to illustrate changes in hygiene practices over time, such as the advent of indoor plumbing and the resulting 'cult of cleanliness' among the middle class. This historical context aids in understanding the evolution of hygiene practices and helps to appreciate the complexity of social life, including family structures, health awareness, and national concerns. Through these comprehensive studies, one gains insight into both the material and non-material aspects of culture, such as the use of tangible objects and the values, beliefs, and norms that shape our daily lives.