Clear writing is the result of clear thinking. Read the question(s) carefully and decide what you want to say in response.
This is a short essay, so be highly selective. Consider which two or three points you wish to impress upon the reader as you answer the questions.
Stick to those few points.
The statement reflects your priorities and your judgment about what you consider important. The organization of your piece will reflect the organization of your thinking.
Each paragraph should deal with one main idea; each sentence should lead naturally to the next. The logical flow of ideas should be clear, with movement and progression from one sentence to the next throughout the piece.
Write in an active voice, as if you’re having a conversation with the graduate admissions committee. “I am interested…” At Hampshire, my thesis research …”