Essays written in an academic voice typically include

1. personal statements.
2. imprecise vocabulary.
3. strong transitions.
4. slang phrases.

3. strong transitions.

Explanation:

Essays written in an academic voice typically include strong transitions. Strong transitions allow a text to flow easily from one paragraph to the next. They also help us link ideas in a way that is logical to the reader. Finally, strong transitions make a text more coherent and cohesive, and can make it look more professional and well-thought out.

the answer is:  

he is voicing feelings shared by all humans regardless of race.

in paul laurence dunbar's poem "we wear the mask," he replicates the words mask and we to emphasize how people in general -not just black americans- hide their true feelings. he suggests the masks cover people's faces and eyes, which are the main parts that display their emotions. he also thinks people's pain conceal behind those masks, so that they cannot see reality and nobody is able to see one another's sorrow.

you need need more details so we can understand what your asking us.