Answer:
nature; Nature versus Nurture controversy
Step-by-step explanation:
Nature versus nurture controversy / debate involves extent to which the particular aspects of the behavior are the product of either inherited or acquired influences.
- Nature is pre-wiring and nature is influenced by the genetic inheritance and also other biological factors. While, nurture is taken generally as influence of the external factors after the conception.
- Nature-nurture controversy is concerned with relative contribution which both influences make to the human behavior.
Thus, having red eyes is a factor of nature and such case study is described in the Nature versus Nurture controversy.