Final answer:
Intrinsic factors are the individual's internal characteristics and behaviors, such as age, posture, diet, drugs, exercise, sleep, and monthly/seasonal cycles.
Step-by-step explanation:
Age, posture, diet, drugs, exercise, sleep, monthly/seasonal cycles can be categorized as intrinsic factors. Intrinsic factors are the individual's internal characteristics and behaviors that can influence their health and well-being. These factors are under the individual's control and can be modified to improve health outcomes.