Final answer:
Obesity in adolescence often persists into adulthood, with a significant increase in rates since the 1980s. Overeating and insufficient physical activity contribute to obesity, but genetic factors are also influential.
Step-by-step explanation:
Obesity in adolescence usually continues later in life. The prevalence of obesity among teenagers has seen an alarming uptrend since the 1980s, with obesity rates having tripled. Adolescents who are obese are likely to become obese adults, and the condition can lead to several health complications like type 2 diabetes, heart disease, and certain types of cancer. Obesity is often a result of overeating and consuming more calories than are expended. While lack of physical activity and poor eating habits contribute significantly, obesity is also influenced by genetic factors and family history, making it a complex issue.