This riddle says: I have a mouth at my head and a bed at my foot. What am I?
The answer is: a river.
A river has a “mouth,” which is the place where it flows into another body of water. It also has a “riverbed,” the channel along the bottom where the water flows.
The wording makes the river sound almost human, with a head, mouth, foot, and bed. But those are all real terms associated with rivers.
Once you recognize the geographical meanings of “mouth” and “bed,” the answer fits naturally.


