Sahara is the longest hot desert in the world.
Landforms are termed as earth which is naturally formed. Everybody wants to live where he/she is comfortable and a place where there is security. Drainage and soil are being a necessary need for food, the same way as water systems. Mountain ranges influence people to settle in those areas.
Digging canals and damming the rivers then it changes the flow of water that erodes landforms and this affects the change in landform. Also drilling holes on earth for oil and mining in carve sides affected the landforms. People make use of landforms, for example, a river to grow crops the soil f being fertile and also raise livestock.