What is the metaphor being used in poem rose that grew from concrete by tupac shaker?

The metaphor in "The Rose That Grew from Concrete" by Tupac Shakur is the comparison of the rose to an individual or group that has overcome great obstacles to achieve success or beauty, despite their environment. The concrete represents the challenges and the harsh circumstances faced by the individual, and the rose that emerges represents their strength, resilience, and determination to rise above these challenges.