Concept:Eye colour is a genetically inherited trait passed from parents to offspring.
Explanation:Heredity determines physical features like eye colour, hair colour, and skin colour.
These traits are fixed at conception by the genetic material from both parents.
For example, if both parents have brown eyes, the child will most likely have brown eyes.
Environment, hormones, or society do not change the basic eye colour a person is born with.
Thus, heredity is the key factor that influences eye colour.
Answer:Option B: Heredity