Which of the following factors is NOT influenced by an individual's culture?

Biological variations refer to the genetic and physiological differences among individuals and populations, which are primarily determined by biological factors rather than cultural ones. These variations can include differences in susceptibility to certain diseases, responses to medications, and general health patterns that are largely dictated by genetics, not influenced by cultural practices or beliefs.

In contrast, nutritional practices, health care interactions, and views about illness are all significantly shaped by cultural contexts. Cultural beliefs guide dietary choices (nutritional practices), the way individuals communicate and interact with healthcare providers (health care interactions), and the interpretations and stigmas associated with various health conditions (views about illness). This makes biological variations the correct answer as the factor that is not influenced by culture in the same manner as the other options.