You will need to narrow or broaden your research question to make sure you have enough supporting information to write an essay that fits with the requirements. Make sure you understand the assignment's guidelines and talk to your professor if you are unsure!
Example of applying these strategies to the topic of aging and narrowing it down to something more manageable:
Now: How does rapamycin help promote slower cellular changes due to aging?
Once you start testing your research question, you might find that you narrowed it down too much. If that’s the case, you can use opposite strategies or remove one component to broaden it.
Example of broadening the research question above:
How can drugs slow down the symptoms of cellular aging? (Removed: drug - rapamycin)
Let your research question evolve naturally as you research.