The answer is C. 19 to 26 the actual age people reach their physical peak is 26 which therefore is C as your answer.
The answer is D.
The basic metabolism depends on height, weight, age, sex and thyroid activity. Outside temperature and climatic conditions also influence significantly. Basal metabolism decreases with age from 2% to 3% per decade after adulthood. Children, on the other hand, have a basal metabolism that is twice as high as that of adults.
Answer:
engaging in regular physical exercise