Answer:
Geomorphological processes and resultant topography are related with glacial, aeolian, fluvial and ground water movement.
- Outwash plain: <em>deposited mostly by water from melting glaciers.</em>
- Sand dunes: <em>not related to glaciation</em>
- Offshore bar: <em>not related to glaciation</em>
- Moraine: <em>deposited by glaciers</em>
Explanation:
Each and every geomorphological process has three types work. For e.g. erosional work, transportational work and depositional work.
- Outwash plain produced by fluvio-glacial depositional work where firstly glaciers melt and then the water flows and deposits sediments in a flat area.
- Moraine produced by glacial deposition. Glaciers carry sediments (pebbles, cobbles) and when it deposits in the valley floor it results a distinguished landform i.e. moraine.
- Sand dunes produced by aeolian action (depositional work). When wind receives obstacle in the form of tree or stone in its way it deposits sand in desert area and produce sand dunes.
- Offshore bar produced by marine processes. when sediments deposited in the coastal area in a huge quantity and friction take place between the wave and sea floor it creates offshore bar.
The Sahara desert is important for a multiple of reasons. One is that although it is a desert, there are many fertile areas of land making it great for farming and supporting life. It also acts as a natural barrier in between north and south Africa, which was able to impact trade with the South, slowing down innovation on both sides.
Answer: B
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