Final answer:
Robert F. Kennedy's paragraph 4 message after Martin Luther King Jr.'s assassination called for nonviolence and upholding Dr. King's legacy of peaceful civil rights advocacy.
Step-by-step explanation:
The main purpose of paragraph 4 of Robert F. Kennedy's statement regarding the assassination of Martin Luther King, Jr., on April 4, 1968, is to make an impassioned plea for nonviolence. Kennedy, recognizing the potential for riots in response to the news of Dr. King's death, spoke directly to an African American community in Indianapolis, advocating for a continuation of Dr. King's legacy of nonviolence and reconciliation rather than retaliation. This message was particularly poignant given Kennedy's own experience with his brother's assassination in 1963 and his close involvement with the Civil Rights Movement, highlighting the importance of unity and peaceful progress amidst a period rife with racial tensions and division.