____ is all of the traits that are biologically passed from parents to children.

The concept of heredity encompasses all the traits and characteristics that are biologically transmitted from parents to their offspring through genes. This includes physical traits such as eye color, hair type, and height, as well as certain predispositions to health conditions and behaviors. In the context of genetics, heredity is crucial for understanding how traits are inherited and how they can influence an individual's development and health over generations.

The other concepts mentioned in the choices pertain to different domains. While environment refers to the external conditions that can influence an individual's development, culture pertains to the social practices and beliefs shared by a group of people. Behavior involves the actions and reactions of individuals, often shaped by both heredity and environmental factors but distinct from the genetic transmission of traits. Therefore, the focus on genetic inheritance clearly identifies heredity as the correct term for traits passed from parents to children.