Which example best demonstrates the importance of having knowledge of evolutionary relationships?

The correct answer for the question presented above is organ transplantation between species. Having knowledge of evolutionary relationships help in successfully transplanting organs to different species based on the fact that some species share similar DNA characteristics. This allowed us to discover that transplant between species is possible. 

really dont know just need some points

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !