How is the electroscope an example of a conductor?

Its in explanation.

Explanation:

Because the electroscope is made from conducting material, some of its electrons move up to the top of the electroscope to be near the charged rod when the rod is held close.

Because it is made up of conducting materials

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

c)as speed changes, wavelength and frequency change.

everything changes!