In the context of the play "Sojourner Truth" about Johanna Evans, the dramatic element that best helps the reader understand the central message is character.
Character development allows the audience to connect emotionally with Johanna Evans and understand her motivations, struggles, and the broader societal issues she represents. By exploring her experiences and challenges, the play highlights themes of social justice, equality, and the fight against oppression, which are central to Sojourner Truth’s legacy. Through the protagonist's interactions and growth, the play communicates its message effectively, allowing the audience to grasp the significance of her journey and the impact of her advocacy.
While other elements like tension, language, and spectacle are also important, character is often the most resonant in conveying the emotional and thematic core of a dramatic work.