The correct answer is the Richter scale
Mercali is used to measure damage created by the earthquake, while the remaining two are not scales of measurement.
<span>A coastal plain is a flat, low-lying piece of land next to the ocean. Coastal plains are separated from the rest of the interior by nearby landforms, such as mountains. In western South America, a large coastal plain lies between the Andes Mountains and the Pacific Ocean.</span>
The landforms would be the islands in the River Thames, its meanders, the floodplains that are mostly located on the islands, The Thames Valley, the Thames Estuary, and the Thames Gateway. Though these might not be the landforms you have in mind, these are all called river landforms.
They were all formed by the natural process of erosion, transportation, and deposition. Most of the formations are formed by this together with the movement of the river and the changing of its course over the period of time.
sorry i don't want the answer