a delta is a:
a.wid river mouth where tides are experienced
b.long narrow arm of the sea resulting from the submergence of a glaciated valley
c.fan-shaped piece of land at the mouth of a river,resulting from deposition by the river
d.funnel-shaped drowned river valley
http://www.tulane.edu/~sanelson/images/delta.gif
c. fan-shaped piece of land at the mouth of a river, resulting from deposition by the river
To determine the correct answer, we can break down each option and assess its accuracy:
a) A wide river mouth where tides are experienced: This option describes estuaries, where freshwater rivers meet the open sea, and tides can be observed. It does not specifically refer to a delta, so we can eliminate this choice.
b) A long narrow arm of the sea resulting from the submergence of a glaciated valley: This option describes a fjord, which is formed by the submergence of a glaciated valley. It is not related to a delta, so we can eliminate this option as well.
c) A fan-shaped piece of land at the mouth of a river resulting from deposition by the river: This option accurately describes a delta. Deltas are formed when a river carries sediment and deposits it at its mouth, creating a fan-shaped landform. This accumulation of sediment forms new land in the shape of a delta, which is commonly found at river mouths. Therefore, option c can be considered the correct answer.
d) A funnel-shaped drowned river valley: This option describes a ria, which is formed when the lower portion of a river valley is flooded due to rising sea levels. It is not specifically related to a delta, so we can eliminate this choice.
After assessing the options, we can determine that the correct answer is c) a fan-shaped piece of land at the mouth of a river, resulting from deposition by the river.