Is this a metaphor alliteration or onomatopoeia? Touch each object you want to touch as if tomorrow your tactile sense would fall out

Alliteration occurs when the same sound is repeated at the beginning of several words or stressed syllables in close proximity.

"Touch each object you want to touch as if tomorrow your tactile sense would fall out" is an example of alliteration, meaning the use of the same sound or sounds, especially consonants, at the beginning of several words that are close together (the repetition of consonants at the beginning of two or more words).

Onomatopoeia: The sound of the word imitates the sound of the thing. Metaphor: Figurative language.