Which of the following is one of UNICEF's major roles?

UNICEF plays a pivotal role in promoting children's rights and wellbeing globally, and one of its major responsibilities is to provide vaccines and support children's health. This includes implementing vaccination programs to combat preventable diseases, ensuring that children receive essential medical care, and working to improve overall health outcomes for children around the world. UNICEF's initiatives aim to reduce child mortality rates and increase access to life-saving interventions, particularly in low-resource settings.

While advocating for women's rights, focusing on education, and managing housing can all be important areas within broader humanitarian efforts, they do not encompass the comprehensive health initiatives that are fundamental to UNICEF's mission. The organization's commitment to children's health and immunization efforts is a core aspect of its work and reflects its dedication to ensuring that every child has the opportunity for a healthy life.