Yes they do although they can survive without water for long periods of time.
Why do other animals come to the water holes to drink when they see that the giraffes are there
yes, they can.
Because they have to bend down to reach the water.
They drink water because if they didn't they would die, and if is a way of keeping their body working in the heat of the African day.
Giraffes primarily drink fresh water. They obtain most of their hydration from the moisture in the leaves they eat, but when they do drink, they seek out freshwater sources such as rivers or ponds. Their long necks allow them to reach down to drink, although they are often cautious and vulnerable while doing so.
to join in so the water doesn't Finnish from them
Giraffes are herbivores and primarily eat leaves and drink water. See related questions for more information.
Of corse they do, if they didn't they would die like any other mammal.
drink
No they do not.
Yes
Yes they do.