What should Ethan do to maintain focus in his essay answers?

• Refer back to the essay prompt regularly to ensure relevance: This is the most effective strategy. By frequently reviewing the prompt, Ethan can ensure that every point he makes directly addresses the question and avoids irrelevant tangents.
• Write about unrelated topics to fill space: This would cause the essay to go off-topic and would not be a good strategy.
• Include as much information as possible, regardless of relevance: This would also lead to including irrelevant information and losing focus.
• The last option is cut off, but the first option is clearly the best way to stay on topic.

Therefore, the correct action for Ethan is:

• Refer back to the essay prompt regularly to ensure relevance