The decoration for her long awaited homecoming were finally up - the ribbons dancing in the gentle breeze which object or concept is personified here

Ribbons

Explanation:

A figures of speech is also known as figurative language and it can be defined as a deliberate and specific construction or use of language by writers, authors or speakers to create a special effect in their speech or literary work (write-ups).

In English literature, the main purpose of a figurative language is to convey more information and enable the readers or listeners have a deeper understanding of a literary work. Some examples of a figurative language used in literature are simile, paradox, metaphor, apostrophe, hyperbole, personification, etc.

In this scenario, the decorations for a long awaited homecoming were finally up; the ribbons dancing in the gentle breeze. Thus, the object or concept which is personified is "ribbon" because it is an inanimate object (a non-living thing) and it is being described to be dancing.

Generally, an inanimate object (non-living thing) such as a balloon, pen, car, building, etc., do not possess the ability to dance because they do not have life like living organisms.