How do I justify the choice of copper, optical fibre and radio links for the...

[DaMystical]

...transmission? How do I explain how a television signal might be distributed around a block of flats using copper cables, giving a justification for this choice of transmission medium including in my own explanation why UHF to VHF/VHF to UHF conversion is necessary.
Giving an explanation for using fibre optic distribution systems in hazardous environments. Explaining why a radio transmission system might be used instead of an infa red transmission system.

[Amber]

for the hazordis enviroments the tempeture has an effect on the signal. So if it's snowing say then the signals get slow and scrambled (Which is why the TV shuts off in a storm) and a radio transision signal works better because the infra red can again depending on the temeture stop getting signal. But the radio transmision signal works better because it won't/can't have problems like that. See what I mean?