Final answer:
The biological analogy in the population ecology approach refers to viewing organizations as living organisms, considering their structures, functions, and interactions with the environment.
Step-by-step explanation:
The biological analogy in the population ecology approach is a) Viewing organizations as living organisms. This perspective is grounded in the understanding that, much like organisms, groups of organisms such as populations not only have a structure but also functions that involve development, reproduction, and interactions with their environment. Population ecology thus includes a study of the number of individuals in an area as well as the factors affecting population size changes over time. Additionally, organismal ecology focuses on the adaptations of individuals to live in specific habitats, while community ecology delves into the interactions within and among different species.