In academic discourse, 'sex' is typically distinguished from 'gender'. Sex refers to the biological and physiological characteristics that define humans as male or female, such as reproductive organs, chromosomes, and hormones. While gender is viewed as a social construct, sex is categorized by these inherent biological differences. Therefore, both options A and B are standard ways of describing the term in this context.

Gender is not solely determined by biology. It encompasses the social, cultural, and behavioral aspects associated with being male or female, shaped by societal norms and expectations. Unlike sex, which is biological, gender is a social construct that defines the roles, behaviors, and identities that a society considers appropriate for men and women, which can vary significantly across different cultures and historical periods.

Sexuality encompasses a broad spectrum of human sexual attraction or behavior, including but not limited to heterosexuality, homosexuality, and multiple or shifting identities. This inclusive definition recognizes that human sexual orientation is complex, fluid, and diverse, moving beyond binary classifications to acknowledge the wide range of ways individuals experience and express their sexual identities in different social and personal contexts.

The gendered division of labour refers to the social and economic practice where tasks are allocated based on gender roles. Specifically, it highlights the societal expectation that women bear the primary responsibility for childcare, housework, and other forms of reproductive labor, regardless of their participation in the formal workforce. This division reinforces traditional gender roles and contributes to the systemic undervaluation of domestic work.

Human mortality is influenced by a wide array of factors. AIDS, various infectious diseases, and lifestyle choices such as smoking are all significant contributors to global death rates. Public health policies in international relations often focus on these issues to improve human security and global health outcomes, which are critical components of modern international development and stability.

The 'double burden' refers to the phenomenon where women are expected to manage both full-time employment and the majority of domestic responsibilities. This concept is historically situated and deeply rooted in the societal separation of the public sphere, associated with men, and the private sphere, associated with women. By acknowledging these historical and structural dimensions, the term captures the multifaceted challenges women face in balancing professional and household roles.

Ethnic cleansing refers to the forced removal or systematic elimination of an ethnic or religious group from a specific territory. This practice is often accompanied by violence, including mass killings and displacement, intended to create an ethnically homogeneous area. The term gained significant international prominence during the Bosnian War in the 1990s, where it was used to describe the atrocities committed against the Bosnian Muslim population.

The concept of 'freedom from fear' focuses on protecting individuals from physical violence and conflict. Preventing the use of child soldiers directly mitigates the risk of physical harm and exploitation in conflict zones. While globalization and disease control are important for human well-being, they are typically categorized under 'freedom from want' or general development, rather than the specific security-oriented 'freedom from fear' framework.

The 'freedom from fear' approach to human security is deeply rooted in international legal and normative frameworks. The UN Charter establishes the global order, the Universal Declaration of Human Rights provides the moral foundation for individual dignity, and the Geneva Conventions provide the legal basis for protecting individuals during armed conflict. Together, these documents form the bedrock of international efforts to ensure human safety and security.

According to United Nations demographic estimates, the world population reached approximately 6.6 billion in 2006. Global population growth has been a significant factor in international relations, influencing resource distribution, migration patterns, and environmental policy. Understanding these demographic trends is essential for analyzing global challenges such as food security, urbanization, and the strain on international infrastructure and development goals.