The eye of octopus and the eye of cats show different patterns of structure, yet they perform similar functions. This is an example of

The correct option is: Analogous organs that have evolved due to convergent evolution

Step-by-Step Explanation:

1. Understanding Analogous Organs:
Analogous organs are structures in different species that perform similar functions but have different evolutionary origins, anatomical designs, and embryonic development. In this case, both the octopus eye and the cat eye are adapted for vision (similar function), but their internal structure, cellular arrangement, and retinal development are completely different (different structure).

2. Analyzing the Structural Differences:
The octopus eye is a "camera-type" eye where the photoreceptors point directly toward the incoming light (direct retina), meaning they do not have a blind spot. On the other hand, the cat eye (like all vertebrate eyes) has an inverted retina where the photoreceptors point away from the light, requiring nerve fibers to route across the retina and bundle together to exit the eye, which creates a blind spot. This fundamental structural difference shows they did not inherit this eye design from a common ancestor.

3. Understanding Convergent Evolution:
Convergent evolution is the process where unrelated or distantly related organisms independently evolve similar physical features or behaviors to adapt to similar environmental pressures or ecological niches. Because both lineages (mollusks and vertebrates) needed a way to detect light and form images to survive in their respective environments, they independently evolved highly functional camera-like eyes.

4. Conclusion:
Since the eyes of the octopus and the cat share a similar function (vision) but possess different structures and evolutionary paths, they are classified as analogous organs, which are a direct result of convergent evolution.