Explanation:

- Option 1: Power Elite Model

- The correct answer highlighting how power is centralized among a small group of elites.

- This model suggests society's political, military, and economic spheres are dominated by a few influential individuals.

- Option 2: Environmental Destruction

- Refers to the degradation of the natural environment due to human activity.

- It is not related to the concentration of power in societal structures.

- Option 3: Stratification

- Refers to the hierarchical arrangement of individuals in society, often based on class, race, and gender.

- While related to social structures, it does not specifically denote concentrated power in elites.

- Option 4: Reliability

- Generally pertains to the consistency or dependability of something, like data or performance.

- Not related to societal power distribution.