Final answer:
The current assumption is that heredity and environment are interdependent in development.
Step-by-step explanation:
The current assumption of modern multidimensional theories about the role of nature versus nurture in development is that heredity and environment are interdependent. This means that both our genes (nature) and our environment (nurture) play a significant role in shaping our development and traits.
Research suggests that our genetic makeup influences how we interact with our environment, and our environment can also shape how our genes are expressed. For example, a child with a genetic predisposition for athleticism may excel in sports if they have access to opportunities and training in that environment.
The nature versus nurture debate continues, and it is widely accepted that both nature and nurture independently and interactively contribute to our development.