The use of regular water creates sediments and bad function of the water pump bearing.
The alternator is belt driven and so is the water pump but that is where the correlation ends. There is no way a bad alternator could cause a water pump to go bad unless the alternator pulley was warped. Then there is a small chance.
the timing belt can cause a water pump to go bad if the belt is on too tight, because that will put stress on the bearings making it wear out rather quickly.
Normal wear on the bearings inside.
No.
Probably not in the context you had in mind. If the thermostat is constantly open, however, it can cause the water pump to run excessively or even continuously, and that'll cause the pump to wear out faster.
yes and no, if the water pump seals are bad antifreeze will leak from the weep hole on the water pump, but it is possible for the pump to go bad and not leak at all.
Usually it does not, but if the water pump is leaking some fluid can be on the water pump pulley which might cause the timing belt to slip.If it happens you are facing a very serious engine repair in couple thousand dollars. Also a bad water pump can cause overheating which can damage the engine too.
it get rusted
I presume you mean car water pump? If the water pump is faulty the car will over heat and the temperature gauge will go up. Make sure that there is enough coolant in the radiator, the radiator or the hose pipe is not leaking and the radiator cap is not faulty, as all of these faults can cause overheating. Once you have excluded these then you can blame the water pump.
Yes. A pump does not have to leak to break down
if you are talking about the weep hole in the water pump. that hole will let water out when the seals in the water go bad. that will tell you to get the water pump replaced.
A plugged fuel filter can cause the pump to fail prematurely due to it having to work harder to pump the fuel through.