Which of the following does NOT contribute to a successful habitat?

Overpopulation does not contribute to a successful habitat because it leads to the depletion of resources essential for wildlife survival. A habitat that is overpopulated can experience excessive competition for food, water, and shelter, ultimately resulting in stress on the individuals within that ecosystem. This can also lead to increased disease transmission and diminished reproductive success, as the habitat becomes unable to sustain the population's needs.

In contrast, effective habitats require adequate cover to protect animals from predators, sufficient space for them to roam, and ample food sources to support their nutritional needs. Each of these elements plays a crucial role in maintaining a balanced ecosystem that can adequately support wildlife populations.