What was Charles Darwin's father's profession?

Charles Darwin’s father, Robert Darwin, was a physician. He was a successful medical doctor in Shrewsbury, England, and became one of the town’s most prominent residents.

Robert studied medicine at the University of Edinburgh and later earned an MD from Leiden University in the Netherlands in 1785. He began practicing in Shrewsbury while still a young man and quickly built a large patient base. His medical career provided the Darwin family with considerable financial security.

Robert was also the son of Erasmus Darwin, another physician, poet, and natural philosopher. This medical and scientific family background helped shape the intellectual environment in which Charles Darwin grew up. Robert initially opposed Charles’s plan to join HMS Beagle, but eventually agreed after being persuaded.

The answer is specifically “physician,” rather than a general description such as scientist: Robert Darwin’s documented occupation was medical doctor.