Answer:
Punctuation
Step-by-step explanation:
Punctuation refers to the marks that are used to separate sentences or ideas, as well as to clarify and emphasize important information. Punctuation marks are essential in any piece of writing since they provide coherence and structure.
Some of the punctuation marks are commas, colons, semi-colons, and periods.
On the other hand, theme, metaphor and simile are all literary devices and elements.