Final answer:
In paragraph 8 of Dr. Martin Luther King Jr.'s speech, the audience shifts to the general public, whom he encourages to actively support racial justice through peaceful protests and advocacy.
Step-by-step explanation:
In paragraph 8 of Dr. Martin Luther King Jr.'s "I Have a Dream" speech, the audience shifts to the general public, including those not traditionally involved in politics or civil rights activism. King's message here is inclusive, calling on every individual to become an active participant in the pursuit of racial justice. He aims to inspire the wider community to support racial justice through involvement in peaceful protests and advocacy, reflecting the communal ethos of the Civil Rights Movement. This means focusing not just on academics or children per se, but rather on a broad-based appeal to all spectators and citizens who can contribute to the cause. Given the historical context of the 1963 March on Washington and the subsequent movements, his call to action was to encourage everyone to take part in nonviolent efforts to effect change.