Question

Which figure of speech is used to create mental images by making direct comparisons between two subjects?

Answer 1

Personification is the humanizing of an object, e.g "the tree speaking in the wind".  A metaphor is used to make direct comparisons between two subjects. An onomatopoeia is a word that shows "sound", e.g BANG. Alliteration is a number of words all beginning with the same letter, e.g Adam ate apple at Alabama. 
 

Answer 2

Metaphor.
personification is giving human characteristics to inanimate objects.
onomatopoeia is a written sound.
an alliteration is a sequence of words with the same first letter. ex. sally sold seashells by the seashore.<span />