Which type of variable is a client's age considered in health practices?

A client's age is classified as a biological variable in health practices because it reflects a fundamental aspect of a person's physical characteristics and biological development. Biological variables are those related to the physiological and physical traits of individuals, which include age, sex, genetic makeup, and overall health status. Age is a critical factor in many health-related assessments, as it influences the risk for certain diseases, appropriate treatment modalities, and overall health recommendations.

Understanding a client's age is essential for tailoring healthcare services and interventions effectively. For example, different age groups have varying health needs, with children requiring different considerations compared to adults or the elderly. By recognizing age as a biological variable, healthcare providers can create more effective and individualized care plans that address the unique health challenges and needs associated with different life stages.

The other options represent different domains that do not accurately characterize age. External variables pertain to influences outside the individual, like environmental factors. Internal variables are more closely aligned with psychological factors, while cultural variables relate to aspects of a person’s social identity and cultural background. These do not encompass the biological implications that age inherently presents in health practices.