How does author harvey l. cobb develop the idea that the spread of cherry trees in washington, d. c., was partly due to good luck? by describing how mrs. taft arranged for the first shipment of trees, cobb highlights her keen interest to support the importance of a knowledgeable first lady. by discussing dr. takamine's role, cobb highlights the crucial connection to japan to support the idea of america's good fortune. by stating that the first shipment of trees was infected, cobb highlights dr. takamine's quick response to support the crucial role he played. by showing the scene in the cab, cobb highlights the cabby's suggestion to support the idea that a small, chance event began the process.