Answer:
4: connotation
Step-by-step explanation:
Connotation definition-
an idea or feeling that a word invokes in addition to its literal or primary meaning.
Denotation is the literal meaning.
Onomatopoeia are words that represent sounds. (boom, crash)
Alliteration is the repetition usually of the first syllables of a word. (Peter Piper picked a peck of pickled peppers)