Poverty is a multi-dimensional social phenomenon that involves the lack of basic needs such as food, water, sanitation, shelter, education, and health care. It is not only characterized by low income, but also by lack of access to opportunities, social exclusion, and lack of voice in decision making. Poverty can be defined and measured in both absolute and relative terms. Absolute poverty refers to a set standard for basic needs that is consistent over time and between locations, while relative poverty views poverty as dependent on social context and measures it relative to others in a population.