This is a photo of a wolf-dog. this animal is the offspring of a gray wolf and a domesticated dog, the german shepherd. the wolf-dog you see here can breed and have pups. what conclusion can you make about the wolf and the german shepherd?

They are part of the same species. The wolf and the German Shepherd must be the same species to breed in the first place.

Gray wolf and a domesticated dog, the German shepherd share an evolutionary past.

Explanation:

Canis familiaris is the scientific name of the dog and Canis lupus is the scientist name of the wolves, both are the same genus Canis  but distinct species, however they can interbreed and produce fertile offspring, they are called wolf hybrids and many of them are pets. They can interbreed because they share an evolutionary past, they share many physical and behavioral traits. Dogs evolved from wolves through the process of domestication

the correct answer is primary!