Humans selectively breed dogs to develop specific phenotypic traits that are desirable for various purposes, such as work or companionship. In the passage, it mentions that German Shepherds were originally bred for herding sheep due to their traits like strength, intelligence, trainability, and obedience. However, over time, they have been selectively bred for other roles such as disability assistance, search-and-rescue, police, military roles, and acting. This suggests that humans selectively breed dogs to enhance certain characteristics that suit their intended functions, whether it be for work, protection, or companionship. IS THIS TRUE?