According to the World Health Organization, there are approximately 1.8 billion adolescents aged 10-19 years worldwide.

Sub-Saharan Africa has the highest proportion of adolescents, with over 25% of the world's adolescent population.

Road traffic injuries are the leading cause of death among adolescents globally, accounting for over 10% of all deaths in this age group.

All of the above are major challenges to adolescent health in developing countries.

The estimated global prevalence of adolescent obesity is approximately 15%.

All of the above are major risk factors for adolescent mental health problems.

The estimated global prevalence of adolescent depression is approximately 10%.

All of the above are key strategies for improving adolescent health globally.

The SDGs aim to reduce adolescent mortality by 75% by 2030.

All of the above are key indicators of adolescent health.

The estimated global prevalence of adolescent anemia is approximately 40%.

All of the above are major risk factors for adolescent HIV infection.

The estimated global prevalence of adolescent STIs is approximately 30%.

All of the above are key strategies for preventing adolescent pregnancy.

The estimated global prevalence of adolescent marriage is approximately 20%.