Final answer:
A floodplain is a broad land area on both sides of a river that can become covered with water during floods, formed by deposited sediments. Deltas are related landforms formed where sediment-laden rivers meet calm waters, leading to deposit build-ups. Braided rivers and swamps are different environments, with the former featuring multiple channels and sediment deposits, while the latter has soggier, stationary water landscapes.
Step-by-step explanation:
A floodplain is a broad strip of land built up by sedimentation on either side of a stream channel, which becomes covered with water during a flood. These plains are created as rivers overflow their banks and deposit sediments like sand and silt, which can form nutrient-rich soil ideal for agriculture. However, due to the nature of floodplains being prone to flooding, any development should consider the risk of flood damage.
When a river slows as it approaches a lake or ocean, it loses energy and begins to deposit the sediments it is carrying. This process can lead to the formation of delta lands in areas where the water movement is calm. The deposited sediments often consist of materials like gravel, sand, silt, and clay, the composition of which can vary depending on the velocity of the water flow.
Braided rivers and swamps/wetlands represent different types of environments. A braided river, characterized by numerous channels and sand and gravel bars, differs from swampy wetlands, which are defined by their stagnant water and soft, wet grounds.