The main thing is that you answer the question completely. Give examples; give as much information as possible. Make sure you write in complete sentences and do not write informally. For example, contractions are not to be used. This is because you want to look smart and be on the good side of the grader in hopes of getting a better grade. Also give extra info even if you're not sure if its right or not. Say it asks you to give two examples, well give three. Remember, you can only gain points, not lose them.