Answer:
Genetics
Step-by-step explanation:
The eye color of an individual; is usually determined through genes and structure of pigments surrounding the eye. This helps in controlling the light that gets into the eye. The eye color may change from blue to other different colors. The genetic chromes also contribute to the change of genes.
Although used to reason that a single gene determines genetic mutations, but the science has proven it wrong. Therefore, genetics can result in different changes in an individual’s life.