D. Mars.
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Location: is defined as a particular place or position. Most studies of geography begin with the mention of this theme of geography. Location can be of two types: absolute location and relative location. In the former case, the location of a place is defined by its latitude and longitude or its exact address.
Place:The physical and human characteristics of a location. Physical characteristics include things such as mountains, rivers, and beaches. Human characteristics include things such as political institutions, culture, housing.
Human-Environment Interaction: can be defined as interactions between the human social system and (the “rest” of) the ecosystem. Human social systems and ecosystems are complex adaptive systems
Movement: Humans Interacting on the Earth. The postmodern world is one of great interaction between places
Region: A region is an area of land that has common features. A region can be defined by natural or artificial features. Language, government, or religion can define a region, as can forests, wildlife, or climate. Regions, large or small, are the basic units of geography
Due to the chemical composition of the earth's atmosphere, most of the infrared radiation emitted by the warm surface never reaches space. Instead the radiation is reflected or absorbed by compounds known as greenhouse gasses. When these compounds absorb the infrared radiation from the surface, the atmosphere heats up.
Until recently, Sudan and South Sudan were a unified country. Africa is mainly known for its diversity of wildlife, but there is more to be known about this continent than its wildlife. There are certain political issues in some parts of the continent that require the world’s attention. Sudan and South Sudan are such parts of the continent which one should understand.