Synecdoche

It is used in reference to political relations, including "having a footing", to mean a country or organization is in a position to act, or "the wrong hands", to describe opposing groups, usually in the context of military power.

Sonnets and other forms of love poetry frequently use synecdoches to characterize the beloved in terms of individual body parts rather than a coherent whole.

Since synecdoche uses a part to represent a whole, its use requires the audience to make associations and "fill in the gaps", engaging with the ad by thinking about the product.

[17] Kenneth Burke (1945), an American literary theorist, declared that in rhetoric, the four master tropes, or figures of speech, are metaphor, metonymy, synecdoche, and irony.

Burke's primary concern with these four master tropes is more than simply their figurative usage, but includes their role in the discovery and description of the truth.

[20] Burke compares synecdoche with the concept of "representation", especially in the political sense in which elected representatives stand in pars pro toto for their electorate.