Write a 250 to 300 word essay concerning the topic of factors that affect your food choices and explore what has affected those choices you eat on a daily basis.

So, since what you're wanting is pointers for the Essay, then here:

There are many things that affect your food choice.
Biological determinants: Hunger, appetite, taste, cravings, etc
Economic determinants: Cost, income, availability, etc
Social determinants: Culture, family, peers, meal patterns, what you grew up eating, etc.
Physical determinants: Access, Location, education, cooking skills, time
Phycological determinants: Mood, stress, guilt, etc
Attitudes, religion, beliefs, etc.

All of these can decide what you eat, how you eat, when you eat, and how often you eat.