USA HISTORY

Detailed explanation-1: -Generally, marine resources are divided into three categoriesg., biotic resources, abiotic (mineral and energy) resources and commercial resources (navigation, aviation, trade and transport etc.). On an average, marine resources are also classified into living resources and non-living resources.

Detailed explanation-2: -Deep-sea minerals, containing metals such as copper, nickel, cobalt, gold and rare earth elements, are found in the deepest and most under-explored parts of the Earth.

Detailed explanation-3: -Resources of high interest and value are gas hydrates, renewable kinetic energy in offshore winds, tides and currents, deposits of rare earth elements, and sand and gravel deposits for construction and beach nourishment.

Detailed explanation-4: -Fishery resources are comprised of myriad biological (e.g., plankton, fish, and mammal species), chemical (e.g., salinity, oxygen concentration), and physical (e.g., sediment type, oil and gas reserve, currents, space) attributes which can be further differentiated by quantity, quality, and relational attributes.