Adolescence is an important period of growth and development, and the sudden increase in height is a remarkable feature of this period. In addition, the functions of nervous system, heart, lungs and other organs have also been significantly enhanced. Adolescence is the golden period of physical and intellectual development in a person's life. Secondly, sexual development and maturity are also important features of adolescence. Secondly, due to physiological changes, it also causes great psychological changes. The core of adolescent mental health is a happy mood. Besides, it is also important to choose a healthy lifestyle. Healthy lifestyle includes: regular life, reasonable diet, rational drug use, establishing sincere friendship between students of the opposite sex, actively participating in recreational activities and sports, not smoking, not drinking, refusing drugs and so on. Reasonable diet, balanced nutrition and regular meals a day can not only meet the nutritional needs, but also avoid obesity or malnutrition caused by excessive intake. Adolescence is a critical period of growth.
So choose: C.