Final answer:
Engaging in physical activity, eating a healthy diet, and maintaining an active social life are three lifestyle components that contribute to increased life expectancy and reduced debility.
Step-by-step explanation:
Three components of lifestyle that can increase life expectancy and decrease debility include regular physical activity, a healthy diet, and maintaining an active social life. Physical activity contributes to lower mortality rates and has been linked to additional years of life. A balanced diet, particularly one high in vegetables and low in animal products, supports efficient body functioning and disease prevention. Additionally, an active social life enhances psychological well-being, which is crucial for overall health. Adhering to these lifestyle choices early can slow down the deterioration of the body that comes with old age and lead to a longer, healthier life.