Correct Option: C. Similar organisms that interbreed freely in the same habitat Explanation of the Correct Answer A population in biological terms is defined as a group of individuals of the same species that live in a specific area and have the potential to interbreed. This definition emphasizes two key aspects:

1. Similar Organisms: The individuals in a population belong to the same species, which means they share common characteristics and genetic makeup.
2. Interbreeding: The ability to interbreed is crucial because it allows for the exchange of genetic material, which is essential for maintaining the genetic diversity of the population. This genetic diversity is important for the adaptability and survival of the species over time.
3. Same Habitat: The individuals must inhabit the same geographical area, which facilitates interactions, mating, and the sharing of resources.

Why Other Options Are Incorrect Option A: Similar organisms that are found in the same habitat - This option is too broad. While it correctly identifies that the organisms are similar and found in the same habitat, it does not mention the critical aspect of interbreeding. Different species can inhabit the same area without being part of the same population. For example, lions and hyenas may live in the same savanna but are distinct species and do not interbreed. Option B: Similar organisms that breed in the same habitat - This option is closer to the correct definition but still lacks the essential detail of "interbreeding freely." Breeding does not guarantee that the organisms can interbreed successfully or that they are of the same species. For instance, two different species may breed in the same area but produce no viable offspring, which means they do not form a population. Option D: Similar organisms eating the same food - This option is incorrect because it focuses on the dietary habits of the organisms rather than their reproductive capabilities or genetic relationships. Organisms that eat the same food can belong to different species and thus do not constitute a population. For example, both rabbits and deer may graze on grass, but they are distinct species and do not form a population together. Summary of Key Points

• A population consists of similar organisms of the same species that can interbreed and share a habitat.
• Interbreeding is essential for genetic diversity and the survival of the species.
• The definition excludes organisms that may share a habitat or food source but do not belong to the same species.
• Understanding the concept of a population is fundamental in ecology and evolutionary biology, as it helps in studying species interactions, evolution, and conservation efforts.

Revision Summary

• A population is defined as similar organisms of the same species that interbreed freely in the same habitat.
• Interbreeding is crucial for genetic diversity and species survival.
• Options A and B lack the necessary emphasis on interbreeding, while option D is irrelevant to the definition of a population.
• Understanding populations is vital for ecological and evolutionary studies.