Final answer:
The phrase about losing herding ability in pedigreed dogs is a supporting example that shows how selective breeding might lead to the loss of valuable traits, accentuating the potential downsides of manipulating genetics.
Step-by-step explanation:
The phrase, 'certain traits like herding ability risk being lost among pedigreed dogs' serves as a supporting example in the argument. It highlights the potential negative consequences of selective breeding, emphasizing how the emphasis on certain traits can inadvertently lead to the loss of other valuable abilities, such as herding in dogs. This example helps to underscore the importance of genetic diversity and the unintended impacts of human-directed selection.