The literary device you are referring to is called a motif. A motif is a recurring element that has symbolic significance and contributes to the overall theme of a literary work.
is a literary device where word or concepts are repeated at the start and finish of an idea and these work as bookends or an envelop to enclose a concept or idea. Comes from the Latin word includo when means "enclose" or "surround"
a motif
This is called the theme.
The term is "motif." It refers to a recurring idea, symbol, or theme that helps to develop a story's overall message or meaning. Motifs can enhance the depth and complexity of a literary work by adding layers of significance.
The topic of a literary work refers to the main subject or theme that the work explores. It is the overarching idea or concept that the author is trying to convey through their writing. Examples of literary work topics include love, betrayal, war, identity, and redemption.
alliteration.
Assonance (the repeated vowel sound) and consonance (the repeated consonant sound).
motif is a recurring theme, idea or subject often in literary works or music
The term you are looking for is "theme." Theme refers to the underlying message or main idea that the author is trying to convey through a literary work.
The unifying subject or idea of a literary work is called the theme. It is the central message or insight that the author conveys to the reader through the text. Themes are often universal concepts that explore human experiences, emotions, and beliefs.
It is called "sibilance."