The best reason for adding this picture to Ship's Chronometer from HMS Beagle is to make the text more engaging by putting a face with Harrison's name. Option A. This is further explained below.
Generally, is simply defined as a timepiece that is impervious to changes in air pressure, temperature, humidity, or movement.
In conclusion, The main reason for adding this photo to Ship's Chronometer from HMS Beagle is to lend a face to Harrison's name, making the writing more interesting.
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