Galena’s research question is "How has hip-hop music changed since its beginnings during the 1970s?”

A good search phrase uses the main ideas in the research question without typing the whole question. “The changes in hip-hop since its beginnings” includes both the topic and what Galena wants to investigate. “Hip-hop music 2020” is too limited to one year, while “history hip-hop” is less focused on change over time.

AI-written and checked against the verified answer.