1. Hip-hop dance style originated in the United States during the 1970s in the Bronx. It is based on techniques like quickly contracting and relaxing muscles to cause jerks in the body. 2. Breakdancing consists of four movements - DJ-ing/turntablism, rapping, breaking, and graffiti art. Street dancing refers to dance styles performed in public spaces as a form of self-expression. 3. Some major global health initiatives include GAVI, which aims to increase access to vaccines; WHO initiatives focused on ending AIDS, TB and malaria; and efforts to achieve sustainable development goals by 2030.