Complex sentence: The flat terrain of the Gambia, drained by the Gambia River is typecast under several habitat types; the habitat types are the Coast, Mangroves and Banto Faros, Wetlands, Farmlands, Savanna and the Sahel habitats, Gallery forests and Urban habitats.
Split into simpler sentences: The flat terrain of The Gambia, drained by the Gambia River is categorised under several habitat types. The habitat types are the Coast, Mangroves and Banto Faros, Wetlands, Farmlands, Savanna and the Sahel habitats, Gallery forests and Urban habitats.