Select the most appropriate meaning of the given Idiom:-

"To be Long in the tooth"

Old people

The most appropriate meaning of the idiom "to be long in the tooth" is old people. The idiom comes from the idea that animals' teeth wear down as they get older, so an animal that is "long in the tooth" is an old animal. In a figurative sense, to say that someone is "long in the tooth" means that they are old.

The other options are not as accurate descriptions of the meaning of the idiom. Having long canine teeth is not the same as being old. To bite someone is not typically associated with the idiom "to be long in the tooth." Used for carnivorous beings is not typically associated with the idiom "to be long in the tooth."