The Millennium Development Goals, adopted by the United Nations in 2000, consisted of 8 overarching goals, which were further broken down into 21 quantifiable targets. These targets were designed to measure progress in areas such as poverty reduction, education, and health across developing nations by the year 2015.

The Chicago School of sociology primarily focused on localized, small-scale crime and delinquent subcultures within urban environments. In contrast, terrorism is a macro-level phenomenon characterized by large-scale, organized political violence. It is deeply rooted in political conflicts between states and non-state actors, often having significant global implications for international relations. Therefore, terrorism represents a distinct category of social problem that requires a different analytical framework than the localized studies of the Chicago School.

Children are often considered the most vulnerable victims of abuse due to their physical dependency, lack of legal autonomy, and limited ability to protect themselves or report incidents of harm.

Pollution is defined as the introduction of harmful materials or energy into the natural environment, which causes adverse changes to ecosystems. It is a broad sociological and environmental concern that encompasses various forms of contamination, including chemical, noise, and thermal waste. While chemical pollution is a specific type, 'Pollution' serves as the comprehensive term for the degradation of environmental quality.

Social risk factors are multifaceted conditions that increase the likelihood of negative outcomes for individuals and communities. Social isolation, mental health issues like depression, and socioeconomic indicators such as low parental education are all widely documented variables that contribute to vulnerability and social disadvantage.

Water scarcity is increasingly recognized by sociologists and political scientists as a critical driver of geopolitical tension and social conflict in the 21st century. As populations grow and climate change impacts availability, access to clean water has become a vital resource battleground, influencing international relations and local community stability.

Manufactured risk, a concept often associated with Ulrich Beck's 'Risk Society', refers to hazards created by human activity and technological advancement rather than natural disasters. These risks arise from our intervention in the natural world, such as climate change, nuclear energy, or genetic engineering. Unlike external risks, these are products of our own social and industrial development, making them complex to manage and inherently tied to modern societal choices.

Global warming refers to the long-term heating of Earth's climate system observed since the pre-industrial period due to human activities, primarily fossil fuel burning. While 'climate change' is a broader term, 'global warming' is the specific term often used to describe the rise in average global temperatures.

The Earth's atmosphere is composed of approximately 78% nitrogen and 21% oxygen. While the question asks what we breathe 'alongside oxygen,' the provided answer key includes 'All of above,' which is scientifically inaccurate as hydrocarbons and pure carbon are not primary components of inhaled air. This discrepancy suggests a potential error in the source material.

While emotional distress like anxiety or being upset can be signs of trauma, the presence of an unexplained venereal disease (sexually transmitted infection) in a child or vulnerable person is a specific clinical indicator often used by professionals to identify potential sexual abuse.