Depends on what kind of poem we're talking about.
The typical answer would be the volta (Italian "turn"). A "turn in thought" of a poem, that is a change in mood, often starting with words like and, yet, but.
The line where the volta occurs is different depending on the type: Petrarchan, Shakespearean, etc.
Within a verse there is also the caesura. A break in the meter at the level of a foot. An incomplete foot. Which is to say a break in the sequence of vocal stresses in an ordered verse (i.e. not free-verse). I associate this with Greek poetry but maybe that's just my own experience.
Those seem to me to be the most conventional interpretations of a "change in the poem"
Elegy
ode is a lyrical poem
antwan lee was here
It's called an onomatopoeia.
simile
setting--a+ fool!
setting
setting--a+ fool!
A catlyst is someone (or an event) that causes change.
what are the literary devices in the poem lynching
Simile: Like polished poems. Similies are the literary devices found most in the poem Orchid.
His first literary success was his poem Venus and Adonis.