Cultural Universals are the shared characteristics found in all human cultures, regardless of their location or time period.

While the nuclear family is a common social unit in many cultures, it is not considered a cultural universal as its structure and composition can vary significantly across different societies.

Cultural Diffusion refers to the transmission of cultural elements from one society to another through various mechanisms such as trade, travel, migration, and media.

All the options provided are examples of cultural diffusion, demonstrating the spread of cultural traits across different societies.

Cultural Convergence refers to the gradual process by which different cultures adopt similar traits, values, and practices, often due to shared experiences, technological advancements, or globalization.

All the factors mentioned can contribute to cultural convergence by facilitating the exchange and dissemination of cultural ideas and practices across different societies.

Cultural Imperialism refers to the imposition of one culture's values, beliefs, and practices onto another culture, often through political, economic, or military power.

All the options provided are examples of cultural imperialism, demonstrating the imposition of dominant cultural traits onto other societies.

Cultural Assimilation refers to the process by which individuals or groups from different cultural backgrounds adopt the cultural traits and practices of the dominant culture in a society.

All the factors mentioned can contribute to cultural assimilation by facilitating the interaction and integration of individuals from different cultural backgrounds.

Cultural Relativism emphasizes the importance of understanding and respecting cultural differences, recognizing that cultural practices and beliefs should be evaluated within their own cultural context rather than being judged based on external standards.

Accepting that polygamy is a valid form of marriage in some cultures is an example of cultural relativism, as it involves understanding and respecting a cultural practice that may differ from one's own cultural norms.

Ethnocentrism refers to the belief that one's own culture is superior to all others, leading to the tendency to judge and evaluate other cultures based on one's own cultural values and beliefs.

All the options provided are examples of ethnocentrism, demonstrating the tendency to view one's own culture as superior and to judge other cultures based on that perspective.

The study of cultural universals and cultural diffusion is primarily a field of anthropology, which focuses on the study of human societies and cultures.