Answer:
a convergent evolution that led to similar embryo development patterns
The correct answer is C. pig, human, and fish evolved from a common ancestor.
Similarities in early embryonic development across different animal species suggest a common evolutionary origin. These similarities can be attributed to the conservation of developmental genes and mechanisms from a common ancestor. Therefore, the early stages of embryonic development in fish, pig, and human embryos are similar because they all share a common ancestor. The fact that the fish occupy a different habitat than pigs and humans is not relevant to the similarities in their embryonic development.