Which audience solution would you use to reach male users who are 18 to 24 years old with the help of a Google Video campaign?

Demographics and Detailed Demographics is the correct solution because it allows you to target users based on specific age ranges and gender, such as males aged 18 to 24. This targeting option is fundamental for reaching predefined demographic segments. Custom Audiences are used to reach people based on their search activity, app usage, or websites they've browsed, not direct age and gender. Affinity Audiences target users based on their long-term interests and passions, which is too broad for a specific age and gender. Life Events target users who are experiencing significant life milestones (e.g., graduating, moving), which is not directly tied to age and gender.