The answer for this one would be rabbit's because the foot belongs to the rabbit. When you say rabbits it just means more than one.
A choir of singers is the answer
Euphemism refers to substituting a harsh word or expression into a mild or indirect one. The negative consequence of using a euphemism is that people may find it as beating around the bush or not telling the truth. On the other hand, it could be interpreted by other people differently.
