AOA Seniors and Mates!

There is a note on the top of essay paper and we do not pay attention to it. Can somebody, especially seniors, help me identifying the true sense of instructions that are.

Make sure you use different forms of discourses , e.g. exposition, argumentation, description and narration.

In my view, our essay should have following things.

Narrative sentences that may tell a event in form of its true story.
Exposition should be done by giving facts.
Argumentation should be given by convincing arguments.
It should also describe various terms e.g. good governance, terrorism etc. In short the key term/s should be described.