Final answer:
Bees carry nectar back to their nest by storing it in honey stomachs and regurgitating it into honeycomb cells in the hive. The nectar is converted into honey by evaporating the water content.
Step-by-step explanation:
Bees carry nectar back to their nest by storing it in specialized structures called honey stomachs. When a bee visits a flower, it sucks up the nectar and stores it in this stomach. The nectar is then regurgitated into honeycomb cells in the hive. The bees then fan their wings to evaporate the water content of the nectar, turning it into honey. The honey is stored in the honeycomb cells as a food source for the colony.