* Nature-nurture is the age-old debate about how much our genes (nature) and our experiences (nurture) influence our behavior and development.

Let's look at why the other options are incorrect:

* A. Developmental: This is a broad term referring to the process of change over time, but it doesn't specifically address the interplay between genes and environment.

* B. Gene-environment: This is a more specific term that refers to how genes and the environment interact. It's a part of the nature-nurture debate, but not the overarching term.

* C. Extrinsic-intrinsic: This refers to motivations coming from external factors (extrinsic) versus internal factors (intrinsic). While it's related to behavior, it doesn't specifically address the genetic component.

In summary: The nature-nurture debate explores how genes and environmental influences work together to shape our development and behavior.