Per your company's data destruction policy, you have been tasked with the destruction of data on a magnetic hard drive. the policy employed by your company specifies that you must destroy the drive by reducing or eliminating the magnetic fields present in the drive. what method should you use?

Physical destruction

Explanation: Consists of the uselessness of the support, it can be done by:

Disintegration: non-uniform cutting or crushing mechanism that reduces the device to pieces of random size and shape.

Crushing: it consists of reducing the support to tiny pieces of uniform size and shape. The use of crushers is normally limited to thin media, such as optical data carriers (DVDs or CDs).

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

the earth’s crust is broken into separate pieces called tectonic plates (fig. 7.14). recall that the crust is the solid, rocky, outer shell of the planet. it is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. both types of crust rest atop solid, upper mantle material. the upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

each tectonic plate is free-floating and can move independently. earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. the term fault is used to describe the boundary between tectonic plates. most of the earthquakes and volcanoes around the pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. other observable results of short-term plate movement include the gradual widening of the great rift lakes in eastern africa and the rising of the himalayan mountain range. the motion of plates can be described in four general patterns:

collision: when two continental plates are shoved together

subduction: when one plate plunges beneath another (fig. 7.15)

spreading: when two plates are pushed apart (fig. 7.15)

transform faulting: when two plates slide past each other (fig. 7.15)