Answer:
In general, erosional coasts are those with little or no sediment, whereas depositional coasts are characterized by abundant sediment accumulation over the long term. Both temporal and geographic variations may occur in each of these coastal types.
Asthenosphere is the upper of the Earth's mantel, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur. (Hopefully This helps)
At least 80 percent of ocean water is included in the deep zone. The correct option among all the options that are given in the question is option "D". It is a fact that 71 percent of earth is covered by the oceans. Approximately 90 percent of the ocean water is considered deep ocean water and it is mostly a mystery till today.
