If by young you mean the larvae, then yes. The bees do feed the larvae.
yes
Nope
Bees build their comb out of wax which has been produced by the wax glands of young bees.
The queen bee is responsible for laying eggs. Worker bees feed the young bees and look after them until they are able to take their place in the hive.
To feed their young
The swarm of bees chased the young girl as she screamed and ran.
Young bees begin life as eggs; they then become larvae (singlar larva) followed by pupae (singular pupa). The next stage is adult.
To feed themselves and their young.
Bees go through four stages of development: egg, larva, pupa, and adult.
A bee hive isn't hexagonal. The cells that bees make from wax inside a bee hive are hexagonal and the bees use these cells to raise young bees and to store honey and pollen.
They haven't got a special name. They are born fully formed and are just referred to by beekeepers as young bees.