Select the most appropriate meaning of the given Idiom:-

Icing on the cake 

A favourable addition to an already favourable condition

The most appropriate meaning of the idiom "icing on the cake" is a favourable addition to an already favourable condition. The idiom comes from the idea of adding icing to a cake, which is a delicious and decorative addition. In a figurative sense, to say that something is "icing on the cake" means that it is an additional good thing that makes a situation even better.

The other options are not as accurate descriptions of the meaning of the idiom. Garnishing a cake with ice is not the same as icing on the cake. A difficult situation is not typically associated with the idiom "icing on the cake." Imitate one is not typically associated with the idiom "icing on the cake."