Which of the following terms ensures the survival of an organism in its environment?

The term that ensures the survival of an organism in its environment is "adaptation." Adaptation refers to the process by which an organism changes over time to better suit its environment and increase its chances of survival. For example, a species of bird with a long beak might adapt to its environment by using the beak to reach food that other birds can't. Over time, this adaptation can lead to the survival and proliferation of that species, as it is better equipped to thrive in its environment. Hibernation, succession, and competition are also important concepts in ecology and biology, but they do not necessarily ensure the survival of an organism in the same way that adaptation does. Hibernation, for example, is a survival strategy used by some animals to conserve energy during harsh environmental conditions, but it does not necessarily lead to long-term survival or adaptation. Succession refers to the gradual process of ecological change in a given area, while competition refers to the struggle for resources between different organisms in an ecosystem. While both of these concepts can impact an organism's chances of survival, they are not the primary mechanism by which organisms ensure their survival in an environment.