44 fibers. Which of the foltowing prowthes the thest scienthe ewghanatiph the tive presence of the appendix in both humans and rabkita? a) Rabbits and humans live in ervironments with simitar Eonvitions. b) Rabbits and hurnans live in environments with similar econetienens. c) The appendix is evolving into a new type of organ in rableits and humans. d) The appendix is inherited from a common ancestor of rabbits and humans.

To determine which option best supports the scientific explanation for the presence of the appendix in both humans and rabbits, let's analyze each option: a) **Rabbits and humans live in environments with similar conditions.** - This option suggests that the presence of the appendix is due to environmental similarities. However, it does not directly address the evolutionary or genetic basis for the appendix. b) **Rabbits and humans live in environments with similar conditions.** - This option is identical to option (a) and suffers from the same issue. It does not provide a strong evolutionary explanation. c) **The appendix is evolving into a new type of organ in rabbits and humans.** - This option implies that the appendix is undergoing a transformation, but it does not explain why the appendix exists in both species in the first place. d) **The appendix is inherited from a common ancestor of rabbits and humans.** - This option provides a clear evolutionary explanation. It suggests that both species share a common ancestor that possessed an appendix, which is a strong argument for the presence of the appendix in both species. Based on this analysis, the best answer is: **d) The appendix is inherited from a common ancestor of rabbits and humans.** This option aligns with the principles of evolutionary biology and explains the presence of the appendix in both species through common ancestry.