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My answer:
Despite the fact that everybody realizes that seawater is pungent, not many realize that even little varieties in sea surface saltiness (i.e., convergence of broke down salts) can effectsly affect the water cycle and sea flow. Since Earth's commencement, certain cycles have served to make the sea pungent. The enduring of rocks conveys minerals, including salt, into the sea. Dissipation of sea water and arrangement of ocean ice both increment the saltiness of the sea. Anyway these "saltiness raising" factors are ceaselessly offset measures that decline saltiness, for example, the nonstop contribution of new water from streams, precipitation of downpour and day off, liquefying of ice.
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Answer:
D. magnetic polarity reversals
Explanation:
The marine magnetic anomalies are the result of two things; the seafloor spreading at the mid-ocean ridges and the magnetic polarity reversals.
The mid-ocean ridges are the places where the new crust forms. This places also have big influence on the magnetic anomalies, with the reason being that the magnetism has higher influence in this parts.
Also, the magnetic polarity reversals play a big role. The Earth has not always had the same magnetic polarity, and multiple times throughout its past the North and South Poles have been switching places when it comes to the magnetism.
The igneous rocks on the ocean floor have proof in them about this, as the metallic components are reacting to the magnetism and face toward the stronger magnetic field.
Over fishing can affect the seas
The primary sector<span> of the economy extracts or harvests </span>products<span> from the </span>earth<span>, </span>such<span> as raw materials and basic foods.</span>
