Sound devices are resources that authors use in order to convey a meaning or an experience through the use of sound. These include devices such as alliteration, assonance and rhyme.
<em>Ex.</em> From somewhere far beyond, the flag of fate's caprice unfurled, (the repetition of the "f" sound).
Imagery refers to the use of vivid descriptions in order to add depth to a work. Authors who use imagery use descriptions in order to create an image in our mind through our senses.
<em>Ex.</em> The girl ran her hands on a soft satin fabric. (sense of touch)
B. All of these Because you need to think of the central point, you need to know how long to make your essay, and you need to plan out your topic sentences and supporting details.