The answer is carbohydrates
Phenotype:
Red eyes: Ee/EE
White eyes: ee
Genotype:
EE: red eyes
Ee: red eyes
ee: white eyes
Cultural factors, parental factors, mood, hunger cravings, health benefits, social setting, convenience, cost and allergies/intolerance are just some examples of factors that affect food purchases! Please let me know if you need any explanations! :)
Answer:
Enforcing health policy rules
Explanation: