Which of the following lines from Alfred Lord Tennyson's "The Brook" demonstrates alliteration? And out again I curve and flow/To join the brimming river
I move the sweet forget-me-nots/That grow for happy lovers.
And sparkle out among the fern/To bicker down a valley.
I bubble into eddying bays/I babble on the pebbles.

- the heat nearly killed them that first summer.

on apex:

removing american indians from the south is for their own good.

figurative language is a resource that fiction writers use to make better descriptions of what they want to write about or express. they can improve their stories, as they can elaborate more vivid and colorful sentences. this way, the reader will be able to have more detailed images in his/her mind.

places, objects, people and even feelings or emotions can be described with a lot of detail to metaphors, similes and personifications. making different kinds of comparisons to make a description more specific, as well as assigning human qualities to non-human objects (and vice-versa) can be very useful for science fiction writers.  

on the other hand, alliterations allow writers to elaborate more entertaining and creative sentences. it consists in using a sequence of words that start with the same consonant letter. they can be used to emphasize something important the writer wants to express, or just as a fun literary device.