What is the best reason for adding this picture to ship's chronometer from hms beagle?

--to make the text more engaging by putting a face with harrison’s name
--to emphasize that harrison is the most important topic in the text
--to the reader understand harrison’s chronometer better
--to encourage the reader to appreciate harrison’s genius

The answer is C. The best reason was to enable the peruser to comprehend Harrison's chronometer better. Keep in mind something essential from the perspective of the British: They were extremely worried for how they could make timekeepers that kept great time as long as they remained impeccably still however not when they were shaken about, and especially not on load up a moving boat. Harrison was extremely keen on that and his discoverings were a breakthrough into ship's chronometers. The photo added encourages the general population to acknowledge what has been proficient by crafted by Harrison.

The answer would be analytical reasoning.