Suspense is a state or feeling of excitement or anxiety uncertain what will happen.
irony, point of view, foreshadowing, detailed description, imagery, similes, onomatopoeia, personification, repetition, symbolism, metaphor.
The tell-tale heart creates suspense because of his point of view that can not be trust. Also in the story they used detailed descriptions to make you wait and wonder why it is so detailed.
The story the lamb to slaughter creates suspense by foreshadowing because when you reread it your like ohhh they were hinting at it the whole time. Also point of view because it limits the view.
In the story contents of a dead-man's pocket suspense is caused by point of view which it limits what a reader can get. Also detailed description causes suspense because you wonder why this is so detailed.