The answer is 3. You never use slang in academic writing, so it's not 4, imprecise vocabulary is also unacceptable in academic writing so it can't be 2, and one usually tries to avoid personal statements in academic writing, because they are mostly factual pieces.
Answer:
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.
