From the conflict perspective, social stratification is universal because those with power control valuable resources and the institutions that manage them, using them to benefit themselves and to keep others in subordinate positions. This ongoing allocation of wealth, status, and opportunities through political, economic, and cultural systems creates and reproduces a structured hierarchy in every society, even though the exact form of that hierarchy can vary. The emphasis is on power and exploitation, not on fixed caste rules or pure merit. That’s why the option describing the powerful using society’s resources to benefit themselves and oppress others best captures why stratification persists universally. The other statements miss this core point: caste in all societies isn’t accurate across all cultures; symbol systems help convey status but don’t by themselves explain universality; merit-based allocation would imply less oppression, which conflicts with the idea of enduring inequality produced by power.

Reality arises from social processes: it is produced and sustained through how we interact with one another and through the institutions that organize those interactions. Berger and Luckmann argue that meanings are negotiated in everyday life—through language, shared practices, and role expectations—and, as these meanings become regularized, they become taken as “real.” Institutions like family, education, law, religion, and the economy provide stable frameworks that shape what we consider normal, possible, or valuable. In short, reality is not just out there or purely in our minds; it is created and maintained collectively by people through social life and the structures that organize it. That makes the best description: people create and maintain a shared reality through everyday interactions and institutions. If reality were only up to individual perception, there would be no shared order; if social institutions didn’t matter, daily life wouldn’t have stable patterns; and if reality were defined solely by economic structures, other dimensions of life like culture and norms would be overlooked.

Power shapes who sets rules and who follows them, while authority provides a legitimized right to exercise that power. In sociology, this pair explains how social order is maintained: power without legitimacy can lead to conflict, but when authority is recognized as rightful, obedience is smoother and stability is more achievable. Weber’s three ideal types show different foundations for that legitimacy: traditional authority rests on long-standing customs and the belief that “it has always been this way”; charismatic authority centers on the leader’s personal appeal, vision, or extraordinary qualities that inspire devotion; rational-legal authority is grounded in formal rules, offices, and impersonal institutions, where legitimacy comes from the system rather than the individual. This combination—power organized through legitimizing authority—and Weber’s typology of authority helps explain why different societies accept different leaders and structures. The other statements misstate the relationship between power and authority or Weber’s view: power and authority are not separate and unrelated, authority can arise from custom or charisma as well as law, and Weber did not reject multiple forms of authority.

Cultural diffusion is about how cultures influence each other through contact, spreading beliefs, practices, and objects from one group to another. This happens as people trade, migrate, travel, and share ideas through media and daily interactions, leading to new customs or technologies in the receiving culture. It isn’t about deliberately isolating cultures, nor about the decline of cultural practices, and it isn’t genetic exchange between populations. An example is how certain foods, fashion, or technologies spread from their place of origin to become popular worldwide through contact and exchange.