Final answer:
Dr. Seuss adopted the title 'Dr.' in his pen name as a whimsical acknowledgment of his father's hopes for him to earn a doctorate, not because his father wanted him to be a medical doctor. Seuss left Oxford without completing his PhD and chose to follow his passion for writing and illustrating.
Step-by-step explanation:
The question relates to why Dr. Seuss used 'Doctor' in his pen name. The use of 'Doctor' was not because his father specifically wanted him to be a doctor, but rather as a form of literary license. Theodor Seuss Geisel, known as Dr. Seuss, adopted the title 'Dr.' as part of his pen name early in his career. This choice was made as a nod to his father's unfulfilled hope that his son would earn a doctorate at Oxford. Although he did attend Oxford, Seuss left without completing his PhD. Instead, he pursued a career in writing and illustrating. The 'Dr.' in his pen name could be seen as an ironic acknowledgment of his father's wishes and his own academic journey.