You should walk it 3 times a week at least. If your dog doesn't exercise, it will be in a bad mood and sleep all day which is bad for big, young dogs. But if you have an old dog, its normal for it to be lazy but be sure it exercises twice week.
As far as it needs to
as much as she needs, so that she is not fat
Your son can be eating to much or not exercising enough. It depends how big it is. If its small and flat, than he needs exercise. If its big and round, than he needs diet and exercise.
60-85 but depends on body type and exercise
when exercise,your body lacks o2 and has to much c02 and needs too get rid of it. this increases your breathing and heartbeat.
a dog is a dog. the basic needs are much the same but daily exercise is crucial for the breed.
if you exercise, you sweat. if you sweat you lose water. if you lose water, your body will have a much harder time building muscle or even functioning properly.
how ever much it needs
None
That depends on how much water you are losing e.g. through sweating, and on your body size. An adult male in a temperate climate who isn't doing violent exercise needs about 3 litres of liquid (from all sources) per day.
That depends how much you drink and how much you exercise.
As much as the plant needs. The excess water is thrown out.
it needs a bit of water (10ml)