Answer:
c. A dam can significantly reduce or shut off the supply of sediment to a delta.
Explanation:
- The rivers that drain into the ocean have deltas and they form the mouth of the river and the soil rich land is a called as the delta. The dam can significantly stop or shut the supply of the sediments to the deltas.
The distribution of fold mountains, as seen in figure 1, are mostly located around areas of tectonic plates surrounding various continents. For example, the Pacific plate, which runs along North America contains a long region of folded mountains along the coast.
In the mid-twentieth century and corroborated ever since, researchers dredging the seafloor could not find any materials older than 180 million years.
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What do you understand by seafloor ?</h3>
The surface of an ocean or sea: seafloor According to this theory, the Earth's crust is divided into a number of enormous plates that together form the continents and ocean floors and are supported by a warm, plastic "mantle" beneath the surface. Mr. Walter Sullivan
Deposits of common minerals like copper, zinc, nickel, gold, silver, and phosphorus can be found on the seafloor. These deposits are nodules on silt from the abyssal plain that are typically 3 to 10 centimeters (1 to 4 inches) in diameter and appear as crusts on volcanic and other rocks.
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