A living connecting link that provides evidence of organic evolution is

The correct option is D Duck-billed Platypus between reptiles and mammals.
A living connecting link that provides evidence of organic evolution is Duck-billed Platypus between reptiles and mammals.

The platypus sports fur like a mammal, paddles its duck feet like a bird and lays eggs in the manner of a reptile.

The platypus is one of the most unusual creatures in the animal kingdom.

The platypus (Ornithorhynchus anatinus), also known as the duck-billed platypus, is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammals that lay eggs instead of giving birth.

So, the correct answer is option D.