Define following concepts

1.1 settlement
1.2 rural settlement
1.3 urban settlement

settlement:an official agreement intended to resolve a dispute or conflict.a place, typically one that has hitherto been uninhabited, where people establish a community

rural settlement:The definition of a rural settlement depends on the country. In some countries, a rural settlement is any settlement in the areas defined as rural by a governmental office, e.g., by the national census bureau. This may include even rural towns. In some others, rural settlements traditionally do not include towns. 

urban settlement:An urban area, or built-up area, is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities, towns, conurbations or suburbs.

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