Global stratification studies often highlight the significant economic disparity between high-income and low-income nations. Historically, data has indicated that a vast majority of the world's wealth, often cited as approximately 75%, is concentrated in high-income countries, reflecting deep-seated global economic inequality and the uneven distribution of resources.

Andre Gunder Frank was a key figure in dependency theory. He challenged the modernization theory assumption that traditional societies were simply 'behind.' Instead, he argued that the development of wealthy 'metropole' nations was directly linked to the underdevelopment of 'satellite' nations through a process of economic exploitation and extraction within the global capitalist system.

The term 'Third World' was historically used to describe countries that were not aligned with either the capitalist bloc or the communist bloc during the Cold War. It generally encompasses developing nations across Asia, Sub-Saharan Africa, and Latin America, which often share characteristics of lower economic development and industrialization.

Global stratification refers to the hierarchical arrangement of individuals and groups in societies around the world, specifically focusing on the unequal distribution of wealth, power, and prestige between nations. This concept explains why some countries are wealthy and dominant while others remain impoverished and marginalized within the global economic system.

In world-systems theory, semi-peripheral nations are those that are not fully industrialized or dominant like core nations, but are more developed than peripheral nations. They often serve as a buffer and are characterized by being in a state of transition or development. They exhibit features of both core and peripheral economies, making 'developing nation' the most appropriate classification among the provided options.

Immanuel Wallerstein is the primary architect of world-systems theory. This macro-sociological perspective analyzes the world as a single social system divided into core, semi-periphery, and periphery nations, emphasizing the historical development of global capitalism and the unequal economic relationships between these regions that perpetuate global stratification.

China has experienced significant economic growth and poverty reduction over the past few decades, lifting hundreds of millions of people out of extreme poverty. Compared to countries like Bangladesh, Mozambique, and Pakistan, China's rapid industrialization and economic reforms have resulted in a much smaller percentage of its population living below the international extreme poverty line of $1 a day.

In sociological and economic classifications, developed nations are typically characterized by higher levels of economic prosperity, measured by indicators such as Gross Domestic Product (GDP) per capita. While technology and power are correlated, wealth remains the primary metric used to categorize nations along the development spectrum.

Intimate Partner Violence encompasses a range of behaviors intended to exert power and control. Physical violence includes direct acts of aggression such as punching and kicking, which result in physical pain and injury to the victim.

Occupational gender segregation refers to the tendency for men and women to be employed in different occupations, industries, or job levels. This phenomenon is often categorized into horizontal segregation, where men and women are in different types of jobs, and vertical segregation, where they are at different levels of hierarchy. Sociologists study this to understand how gendered expectations, socialization, and systemic barriers influence career choices and contribute to wage gaps and unequal opportunities in the workforce.