Final answer:
The factors that can be controlled in behavior concerning health are levels of physical activities, amount of food intake, and choice in friends; all of these contribute significantly to health and are the correct answer to the question.
Step-by-step explanation:
The factors that can be controlled in behavior which may help in maintaining or improving health include 1) Levels of physical activities, 2) Amount of food intake, and 3) Choice in friends. Therefore, the correct answer to the question is 4) All of the above. Each of these factors plays a vital role in an individual's health. Regular physical activity can serve as both an appetite stimulant and suppressant, as well as aid in burning fat and calories. The amount of food intake, especially when focused on healthy food choices and mindful of eating patterns, is critical for proper nutrition and weight control. Finally, the choice in friends can influence one's lifestyle activities and behaviors, including diet and exercise habits. Additionally, lifestyle changes brought on by choice or circumstance, such as aging, can impact diet, potentially affecting the onset of conditions like Type 2 Diabetes.