A magnetic survey can be used to explore for minerals that cannot be seen because the deposit is hidden underground.
<h3>What is Magnetic Survey?</h3>
Magnetic surveying is one of the methods used in archaeological geophysics.
This involves the measurement of and recording of Spartial variations in the earth's magnetic field.
Magnetic survey is also in search for mineral-bearing ore bodies or even oil-bearing sedimentary structures.
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The currents of the major oceanic gyre systems are driven by the drag of surface winds that are part of the major anticyclonic pressure and wind systems over the ocean basins. Option A. This is further explained below.
<h3>What is an Oceanic gyre system?</h3>
Generally, An ocean gyre is simply defined as a huge system of circular ocean currents generated by world round wind patterns and energy caused by the rotation of the Earth.
In conclusion, Surface wind drag is caused by the large anticyclonic pressure and wind systems that exist across the ocean basins.
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I agree with the answer C
