The cutting tool that has a zig zag edge is called “Pinking shears “
Answer:
Secondary memory.
Explanation:
Unlike main memory which loses its content when electrical power to the system is turned off, secondary memory is volatile and persistent in nature. i.e it retains its content whether or not power is supplied to the computer that is holding it. As a matter of fact, they (secondary memory) are meant to store data permanently. Examples of such memory are the hard drives, floppy disks, flash drives, CDs and CDROMs.
Also, unlike the primary or main memory that can be accessed directly by the processor of the computer housing it, secondary memory are not accessed directly.
Applying potential difference to a conductor, by potential force, free electrons gain energy and move from low to high potential. Thus, electrons move from one atom to another.
D doesn't make much sense, it's valid, but not what we're looking for. B also has a correlation with D, same reasoning applies. As for A, it seems pretty legit, but I don't believe that's what we're looking for.
Choice C is the most obvious one though. We're talking about a network and as may or may not know it's a wireless one in a manner of speaking. A <span>couple of computers in the network that have trouble maintaining a signal will indefinitely lead to failure of a network since both the links and nodes of certain computer systems are incapable of maintaining a signal. </span>